Bicycles

Protection for your pint-sized cyclist The Tyro is a dedicated children's helmet packed with the same performance and comfort found in adult helmets. A Fidlock magnetic buckle lets kids secure the chin strap easily, and an easy-to-adjust rear dial conforms to a wide range of head sizes. Product details - In-molded EPS shell with additional rear coverage for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, secure, kid-friendly fit - Dialed fit system provides a secure and comfortable fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Adjustable helmet straps provide a clean look and easy fit management - Helmet meets ASTM standards—their tests use a smaller mass headform more realistic to younger riders - Crash Replacement Guarantee provides free helmet replacement if it is involved in a crash within the first year of ownership Specifications - Size (head circumference): Kids (48-52cm) - Fit system: HB-80 - Pad material: Moisture wicking pads - Buckle type: Fidlock buckle - Weight: 289g

A value-packed helmet perfect for kids who just want to hop on their bike and ride. Ready to ride with the grown-ups The Trek Tyro is a dedicated youth bike helmet packed with the same performance and comfort found in adult helmets. A Fidlock magnetic buckle and simple-to-adjust dial lets kids secure the chin strap and helmet easily while fitting a wide range of head sizes. Plush pads make the helmet comfortable for a full day on the bike. PRODUCT DETAILS - In-molded EPS shell with additional rear coverage designed for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, kid-friendly fit - Dialed fit system provides a snug and comfortable fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Adjustable helmet straps provide a clean look and easy fit management - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Helmet meets ASTM standards — their tests use a smaller mass headform more realistic to younger riders - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 5 and over

A value-packed helmet perfect for kids who just want to hop on their bike and ride. READY TO RIDE WITH THE GROWN-UPS The Trek Tyro is a dedicated youth helmet packed with the same performance and comfort found in adult helmets. A Fidlock magnetic buckle lets kids secure the chin strap easily, and an simple-to-adjust dial fits a wide range of head sizes. Plush pads make the helmet comfortable for a full day on the bike. PRODUCT DETAILS - In-molded EPS shell with additional rear coverage for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, kid-friendly fit - Dialed fit system provides a snug and comfortable fit - Soft, comfortable, moisture-wicking, and washable helmet pads - Adjustable helmet straps provide a clean look and easy fit management - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Helmet meets ASTM standards-their tests use a smaller mass headform more realistic to younger riders - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over

When every curb is a jump and every patch of dirt screams for a skid, the Tremor MIPS is there to keep smiles wide. Featuring some of the best technologies from Giro's adult line, like In-Mold construction for reduced weight and enhanced durability, and their acclaimed Roc Loc Sport system for fast, secure fit adjustments, the Tremor is ready for any ride. Tremor MIPS models also include an integrated Multi-Directional Impact Protection System (MIPS), which can redirect energy and provide more protection in certain impacts, providing the latest in head protection technology for junior riders.

Set your little thrill-seeker up for safe success in a helmet outfitted with Multi-directional Impact Protection System (MIPS). Developed by brain surgeons and scientists, MIPS helps reduce rotational forces on the brain caused by angled impacts to the head. - For growing kids, ages 2 – 4 - MIPS Brain Protection System - Fidlock magnetic buckle fastens effortlessly for a quick, secure, kid-friendly fit - Soft, removable helmet pads can easily be cleaned - Dialed fit system provides a secure and comfortable fit - Adjustable helmet straps provide a clean look and easy fit management - Helmet meets ASTM standards, whose tests use a smaller mass headform more realistic to younger riders - Crash Replacement Guarantee provides free helmet replacement if it is involved in a crash within the first year of ownership

Big protection for little riders Set your little thrill-seeker up for safe success in a helmet outfitted with Multi-directional Impact Protection System (MIPS). Developed by brain surgeons and scientists, MIPS helps reduce rotational forces on the brain caused by angled impacts to the head. Key features - For growing kids, ages 2 - 4 - MIPS Brain Protection System - Fidlock magnetic buckle offers quick, secure fit that's easy for kids - In-molded EPS shell with full-coverage for protection and durability - LockDown dividers make helmet strap management clean and are easy to adjust - Reflective elements on back of helmet for enhanced visibility - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - One Size = 46-50cm

A helmet with big kid features for smaller riders. TODDLERS NEED HELMETS, TOO Designed to help protect the young cyclist in your life, the Little Dipper toddler helmet features a built-in visor and easy-to-use magnetic buckles with a kid-friendly fit. It's perfect for little ones riding in a trailer, a child carrier, or all on their own. PRODUCT DETAILS - In-molded EPS shell with full coverage designed for protection and durability - Fidlock magnetic buckle fastens effortlessly for a quick, kid-friendly fit - Soft, removable helmet pads that are easy to clean - Dialed fit system provides a secure and comfortable fit - Adjustable helmet straps provide a clean look with easy fit management - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership - Helmet meets ASTM standards—their tests use a smaller mass headform that's more realistic to younger riders - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over Size Circumference - Toddler: 46 - 50 cm/18" - 20"

The Tremor MIPS helmet's cool style is more than meets the eye. It features the latest in head protection technology, an easy-to-adjust fit system, and 18 vents for breathability, making it a big hit with parents and little shredders alike. Featuring some of the best technologies from our adult line, like In-Mold construction for reduced weight and enhanced durability, and our acclaimed Roc Loc Sport system for fast, secure fit adjustments, ensure that the Tremor is ready for any ride. The Tremor MIPS also includes an integrated Multi-Directional Impact Protection System (MIPS), which can redirect energy and provide more protection in certain impacts, providing the latest in head protection technology for junior riders. MIPS: - Integrated MIPS (Multi-Directional Impact Protection System)—allows you to customize fit/feel for great stability and long-range comfort while providing an added measure of protection from rotational forces in the event of an angled impact Construction: - In-Mold construction - Full Hardbody shell Shell Type: - Polycarbonate shell - Number of vents: 18 Sport: - Cycling Visor: - Removable visor Interior/Liner Type: - Quick-dry padding Fit system: - Roc Loc Sport MIPS Impact Liner Type: - EPS

When your young rider is dedicated to the dirt, you need gear that keeps pace with their skill set. The Smith Wilder Jr. mountain bike helmet combines the enhanced angle impact protection of MIPS with a lightweight, ventilated design just like our adult helmets. 21 fixed vents keep the air flowing as kids bomb down their favorite trails. Our VaporFit dial system adjusts around the head with the turn of a dial to get the right fit every time. There's a built-in visor to cut glare and integrated sunglasses storage, so kids can stow their glasses just like mom or dad. PROTECTION: Lightweight in-mold construction, MIPS Brain Protection System reduces rotational forces caused by angled impacts to the head. FIT / INTEGRATION: VaporFit dial adjustment system offers 270-degree fit adjustment with the turn of a dial, Designed for ultimate integration with Smith performance eyewear and goggles for maximum comfort, venting and storage convenience, AirEvac ventilation system integrates with Smith goggles and eyewear for fog-free lenses FEATURES: 20 fixed vents for consistent airflow, Integrated visor, Performance comfort lining, Lightweight, low-bulk single-layer webbing WEIGHT: (Size XS, MIPS): 10 oz / 270 g CERTIFICATION: CPSC, CE EN 1078

Premium Style for Recreational MTB How do you improve on the #1, top-selling helmet on Earth? Carefully, and with meticulous attention to detail. This updated helmet boasts a revised silhouette, redesigned integration of the Mips® Brain Protection System, and improved cooling power. Whether you're headed for off-road adventure or just a relaxing spin, the Fixture™ Mips II offers the right combination of value, performance, and classic design that can't be beat. With a strong and striking style, quick-dry padding, a simple and durable Roc Loc® Sport fit system, and reflective rear decals, every rider demand has been addressed. After all these updates and improvements, you'd be forgiven for thinking we doubled the price of this second-generation Fixture, but the Fixture Mips II retains its position as the value leader. FEATURES - INTEGRATED MIPS® BRAIN PROTECTION SYSTEM — All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards. The goal of Giro's Integrated Mips®-equipped helmets is to reduce rotational forces while enhancing fit and comfort by combining the Mips slip plane with the helmet's adjustable fit system. Giro believes that helmets equipped with this technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts. Learn more about Mips in the video above. - IN-MOLD CONSTRUCTION — In-Mold Construction fuses a tough polycarbonate outer shell with the helmet's impact-absorbing foam liner. The fusion process allows for better ventilation systems, making in-mold helmets lighter and cooler than traditional helmets. - ROC LOC® SPORT FIT SYSTEM — The Roc Loc® Sport fit system offers easy one-handed operation with a 7cm adjustment range. Its confident clicking feel and sound lets riders know that the helmet is adjusting to a comfortable fit. With comfort similar Roc Loc 5 and ponytail compatibility, the new Roc Loc Sport fit system brings premium function to sport level helmets. - REFLECTIVE DETAILS — Reflective Details enhance visibility at nighttime or in low-light conditions when illuminated by a light source, such as headlights, by returning the light back to the source and reaching the driver's eye. - UNIVERSAL FIT™ SIZING — Our Universal Fit helmets are sculpted to look good and fit great for almost anyone on the first try. By developing proprietary shell sizes based on specific customer groups, and combining them with an easily-adjustable fit system, it's easy for you get the right fit, straight out of the box, without the hassle or expense of trying multiple sizes. HIGHLIGHTS - Quick-dry padding Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older

LEARNING TO BALANCE AND RIDE A BIKE HAS NEVER BEEN EASIER. PRE HELPS YOUNG RIDERS GET ROLLING AND ENJOY THEIR JOURNEY TOWARD TWO-WHEELED ADVENTURES. KEY PERFORMANCE FACTORS Lightweight - High-quality ALUXX aluminum frame and thermo-formed polymer fork delivers exceptional frame performance with the lightest weight in its category. Easy to ride - Sleek design and stable 12-inch wheels make it easy for young riders to develop balance and riding skills. Kid-friendly features - Lightweight components for enhanced control and safe, ergonomic positioning and fit. TECHS & FEATURES: ALUXX ALUMINUM TECHNOLOGY This Performance level frame material features 6061 alloy with single-butted tubes to produce strong, lightweight framesets for a variety of different bikes and riding styles.

Nothing beats the joy of riding your first pedal bike. This two-wheeler comes with removable training wheels and makes it easy for kids to fall in love with cycling. Built for kids Short crank length and narrow Q-factor make Animator easy to pedal, and a lightweight aluminum frame allows small children to have more control. Kid-friendly features Short-reach brake levers, lower stand-over height, protective stem pad and removable training wheels make it fun and safe for kids learning to ride a pedal bike. Durable ALUXX aluminum frame material provides long-lasting reliability, backed by a lifetime warranty on the frame.

Let your young rider's imagination soar with the Adore 16, a perfect stepping stone into the world of biking adventures. Designed for endless fun and confidence-building, this lightweight and vibrant bike opens up a world of exploration and joy on two wheels. Lightweight ALUXX-grade aluminum frame material and innovative fork design come together to keep her bike light and easy to pedal. Intuitive Singlespeed drivetrain and smaller grips keep it easy for her to learn and feel comfortable behind the wheel. Safe Easy balance tires, training wheels and a low standover height allow for safe maneuvering.

Lightweight and breathable full-face protection The Youth Proframe Nace Helmet is a lightweight and breathable full-face trail helmet, designed to meet the needs of all-mountain riders, enduro racers, and young rippers on the rise. Featuring Mips® technology, a 3-position adjustable and goggle-compatible visor, and boasting increased ventilation, it's the perfect lid to protect young riders on the trail. It also comes with an under-visor GoPro mount (removable) to capture all the footage of those awesome runs. Key Features - Mips® equipped - 3-position adjustable visor - Under-visor GoPro mount included - Increased ventilation - Meets the ASTM-F1952 Downhill MTB certification standard

Lightweight full-face helmets for all-mountain riders and enduro racers. The Youth Proframe Helmet delivers exceptional airflow and breathability on both climbs and descents. Those looking to capture every sweet run will appreciate the removable, under-visor GoPro mount. Ride wide open with the Proframe Helmet. Key Features and Specifications: - Mips® added protection system has been proven to reduce the rotational motion when implemented in a helmet by absorbing and redirecting energies and forces otherwise transmitted to the brain - 3-position adjustable visor compatible with goggles - Removable under visor GoPro mount included - Increased ventilation and decreased surface contact area improve cooling - Includes additional pad set to optimize fit Meets the ASTM-F1952 Downhill MTB certification standard Note: Avoid exposure to aerosol sprays like bug repellent and sunscreens as they can cause your helmet's finish to peel 22% ABS, 21% EPS, 15% polycarbonate, 13% polyurethane, 9% Pa

Teaching and learning to ride is a breeze with Precaliber 16. It has a handle built into the saddle so you can guide while they ride, and tool-free training wheels that are super easy to install and remove. It's a great fit for kids ages 4-5 between 39-46-inches tall. It's right for you if... It's finally time to teach your little one to ride! You want to make it a great memory, so you're looking for a bike that's comfortable, durable, and fun. Simplicity is key, and you want to be able to pop off the training wheels easily when the time is right. The tech you get This kid-friendly bike has a handle integrated right into the saddle so you can help guide your child while they ride, plus a coaster brake and tool-less training wheels that can be installed and removed at the turn of a dial. Plus, the lightweight aluminum frame is easy to maneuver. The final word You want to make sure your child's first bike is comfortable, durable, and fun. Each of our bikes, all the way down to the smallest size, is built to our highest standards, so you can feel confident when you choose Trek for your family. Why you'll love it - This bike is a memory-maker: seeing your child ride their bike for the first time is something you'll never forget - This bike is hand-me-down heaven: it's built to last, so younger siblings can inherit this bike and it'll still feel like new - You shouldn't buy your kid's bike where you buy your cereal—Unlike big box brands, Trek kids' bikes are assembled by people who know bikes - You can replace the saddle's integrated handle with an integrated light mount when your child starts adventuring on their own - Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off

Teaching and learning to ride is a breeze with Precaliber 16 Coaster Brake. It has a handle built into the saddle so you can guide while they ride, and tool-free training wheels that are super easy to install and remove. It's a great fit for kids ages 4-5 between 39-46? tall. It's right for you if... It's finally time to teach your little one to ride! You want to make it a great memory, so you're looking for a bike that's comfortable, durable, and fun. Simplicity is key, and you want to be able to pop off the training wheels easily when the time is right. The tech you get This kid-friendly bike has a handle integrated right into the saddle so you can help guide your child while they ride, plus a coaster brake and tool-less training wheels that can be installed and removed at the turn of a dial. Plus, the lightweight aluminum frame is easy to maneuver. The final word You want to make sure your child's first bike is comfortable, durable, and fun. Each of our bikes, all the way down to the smallest size, is built to our highest standards, so you can feel confident when you choose Trek for your family. Why you'll love it - This bike is a memory-maker: seeing your child ride their bike for the first time is something you'll never forget - This bike is hand-me-down heaven: it's built to last, so younger siblings can inherit this bike and it'll still feel like new - Investing in a kids' bike from an established bike brand is worth it-Trek kids' bikes are designed and assembled by people who know bikes - You can replace the saddle's integrated handle with an integrated light mount when your child starts adventuring on their own - Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off Features: Integrated handle Hidden handle under the saddle helps you guide your child while they learn to ride. Toolless training wheels When your little one is ready to ditch the training wheels, the only tools you'll need are your hands.

Precaliber 20 Coaster Brake will have your little rider begging to go out for a pedal on their first real big kid bike. It's a great transition model from training wheels. It has one speed, a coaster brake, and a saddle with an integrated handle that can be swapped out for a light mount. For kids ages 6-8, between 45-52" tall. IT'S RIGHT FOR YOU IF… Your kid is ready to leave training wheels behind, and you want to get them a fun, durable, bike that's simple to use. You don't want to settle for a big box brand, because you know the value of a high-quality bike that will keep your kid confident and in control. THE TECH YOU GET A lightweight Alpha Silver Aluminum frame, one speed, and a coaster brake. Plus, a kickstand and a saddle with an integrated handle that can be swapped out for an integrated taillight mount. Everything on this bike is built to last, so it'll still feel like new when handed down to younger siblings. THE FINAL WORD This bike is the perfect choice for young riders who want to transition from a little kid bike to a big kid bike, with a simple, quality frame that will keep them upright and smiling while they ride at the park with friends or on the local bike paths with your family. WHY YOU'LL LOVE IT - One speed is all you need—a simple set-up gives kids confidence and helps them stay in control - Coaster brakes are simple and intuitive for kids to use—they just pedal backwards to stop! - You can replace the saddle's integrated handle with an integrated light mount to boost visibility on family adventures and solo excursions - Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off - Investing in a kids' bike from an established bike brand is worth it—Trek kids' bikes are designed and assembled by people who know bikes

Precaliber 20 7-Speed is a versatile kids' bike for young adventurers. It has a lightweight frame and quality components like a front suspension fork, 7-speed gearing, and hand brakes that are perfectly sized to better fit small riders. For kids ages 6-8, between 45-52" tall. It's right for you if... You love exploring nature on your bike, and want your little adventurer to come along. You're looking for a high-quality kids' bike that's comfortable, durable, and most of all, super fun for your little shredder. The tech you get A strong, lightweight aluminum frame, a simple 7-speed drivetrain that's easy for kids to handle, and a front suspension fork to smooth out bumps on the road and trail. Plus, it has a kickstand, mounts for a rear rack, and a saddle with an integrated handle that can be swapped out for an integrated taillight mount. The final word When you're young, just being outside is an adventure. Precaliber's rugged styling makes it the perfect vessel for young explorers. They may pretend to be scaling dangerous mountains or escaping terrible beasts, but with a high-quality build and components, you'll always have peace of mind. Why you'll love it - Intuitive twist-shift makes it easy for kids to switch gears when their terrain changes - You can replace the saddle's integrated handle with an integrated light mount to boost visibility on family adventures and solo excursions - This bike is hand-me-down heaven: it's built to last, so younger siblings can inherit this bike and it'll still feel like new - Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off - Investing in a kids' bike from an established bike brand is worth it—Trek kids' bikes are designed and assembled by people who know bikes Features: Integrated handle Hidden handle under the saddle helps you guide your child while they learn to ride. Upgrade your pedals and love your bike more Pedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.

Precaliber 24 8-Speed Suspension is a versatile kids' bike built for young adventurers who love riding off the pavement and into the dirt. It has a sturdy yet light aluminum frame with a performance suspension fork and an 8-speed drivetrain perfect for racing home from school, zipping through the woods, and riding trails and paths with family. For kids ages 8-12, between 51"-59" tall. WHY YOU'LL LOVE IT - This bike can get your youngster hooked on a lifetime hobby that's healthy, environmentally friendly, and fun - Intuitive twist-shift makes it easy for kids to switch gears when their terrain changes - You can replace the saddle's integrated handle with an integrated light mount to boost visibility on family adventures and solo excursions - Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off - Investing in a kids' bike from an established bike brand is worth it—Trek kids' bikes are designed and assembled by people who know bikes IT'S RIGHT FOR YOU IF… You love exploring nature on your bike, and your kid loves adventuring with you! You're looking for a high-quality kids' bike that's comfortable, durable, and has trail-ready parts for your up-and-coming singletrack shredder. THE TECH YOU GET A strong, lightweight aluminum frame, a simple Shimano 8-speed drivetrain that's easy for kids to handle, and a front suspension fork with 45mm of travel to absorb bumps. Plus, a kickstand, rear rack mounts, and a saddle with an integrated handle that can be swapped out for an integrated taillight mount. Everything on this bike is built to last, so it'll still feel like new when handed down to younger siblings. THE FINAL WORD This rugged, high-quality bike encourages fun and skill-building on the trail. It's perfect for kids who are getting into off-road riding, with a trail-smoothing front suspension fork and an 8-speed drivetrain.

Precaliber 24 8-Speed Suspension is a versatile kids' bike built for young adventurers who love riding off the pavement and into the dirt. It has a sturdy yet light aluminum frame with a performance suspension fork and an 8-speed drivetrain perfect for racing home from school, zipping through the woods, and riding trails and paths with family. For kids ages 8-12, between 51-59 inches tall. - This bike can get your youngster hooked on a lifetime hobby that's healthy, environmentally friendly, and fun - Intuitive twist-shift makes it easy for kids to switch gears when their terrain changes - You can replace the saddle's integrated handle with an integrated light mount to boost visibility on family adventures and solo excursions - Like all Precaliber bikes, the frame is lower so it's easier for kids to stand over and hop on and off - Investing in a kids' bike from an established bike brand is worth it—Trek kids' bikes are designed and assembled by people who know bikes

The Yoji 16” is designed and built specifically for kids 3-5 years old (36"+ tall). It is a lightweight (just over 14 lbs) first pedal bike with real off-road capability. The Yoji’s lightweight frame is constructed of formed 6061-T6 aluminum while a newly slimmed-down 4130 Chromoly fork handles the steering. Tektro Mini V-brakes with miniature levers for little hands and the super-soft Brood Tenderiderz grips adorn the 22mm diameter alloy bars. A forged short-reach stem can be flipped to raise the handlebar height in increments. The stem and multiple headset spacers allow parents to adjust the cockpit as kids grow. The Perch mini Pivotal saddle from Brood Bike Co. along with an alloy post make for an ultra-low minimum seat height. The Yoji features sealed cartridge bearings everywhere and 102mm 3-piece alloy cranks designed in-house specifically for little kids. A real cassette hub with a Shimano-compatible cog is a huge upgrade from the coaster brake commonly found on kids' bikes. Topping things off are easily the best off-road tires available in this size - the exclusive 16” x 1.90” Spawn Cycles Loam Star tires with puncture protection.

Wahoo 24 Trail is a light and tough kids' bike that's ready to roll off-road. Its sturdy aluminum frame is easy to maneuver as they weave their way down the trail, but rugged enough to handle the tough stuff. A 9-speed 1x drivetrain gives them plenty of gears for pedaling up steep trails, and disc brakes provide next-level stopping power to slow their roll or help them stop on a dime on the way back down. Perfect for riders between 51-59" tall. It's right for you if... You're ready to take your kiddo off-road and want a kids' bike that's up for the task. You want the added grip of big, knobby tires, plenty of gears to keep them spinning up hills, and the reliable stopping power of hydraulic disc brakes. The tech you get An Alpha Silver Aluminum frame with 24" wheels and wide 2.4" knobby tires that bite into dirt and give plenty of traction. Tons of gears to pick from with a 9-speed 1x microSHIFT drivetrain, and serious stopping power from hydraulic disc brakes. The final word Wahoo 24 Trail is a proper off-road ride in a pint-sized package. It's a kids' bike for little rippers who can't wait to cut loose and want a bike that's light, maneuverable, and darn tough, too. Its hydraulic disc brakes give your kiddo a serious advantage while they progress on the trail. Why you'll love it - Wahoo's aluminum frame is light enough for easy handling and tough enough to roll through the rough stuff - Hydraulic disc brakes give them the same serious stopping power you'll find on adult mountain bikes - A 9-speed drivetrain gives your kiddo plenty of gears to shift through, but isn't too much to handle - Wide and knobby 2.4in tires provide heaps of traction for confidence on the trail - Trek kids' bikes are designed and assembled by people who know bikes — and backed by a lifetime warranty