Whether tackling gravel, commuting to school, shredding trails or reaching peaks, the woom UP 5 kids' electric mountain bike expands their range with dynamic pedal assist and a kid-specific design.
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- 24 in. electric mountain bike designed for children aged 7 years and older
- Created with kids in mind with a kid-specific geometry and enhanced safety features; at 15.5 mph, motor-assist automatically switches off so they use their own pedal power
- Delivering a smooth and resistance-free ride, the updated Fazua drive system offers 3 different levels of pedal assist, as well as the option to ride without pedal assist
- Combined motor and battery unit is compact, lightweight and subtly integrated into the down tube; the battery can easily be removed to charge
- Compared to its predecessor, the increased motor efficiency of the updated drive pack provides more power without compromising the battery range
- Cadence and torque sensors are built into the motor, providing a smooth, natural-feeling ride while enabling your rider to go farther
- High-quality suspension fork can be dialed into the rider's specific weight for comfort on the bumpiest terrain
- With adjustable compression and rebound damping, the fork can be tuned for the terrain and the day's conditions; its lockout function is a bonus on climbs and flats
- SRAM NX drivetrain has 11 gears and a wide gear ratio for tackling diverse terrain; coupled with the e-motor, it's ready to thrive whatever the gradient
- Smooth trigger shifting, courtesy of a precise and easy-to-operate gear system
- With excellent modulation and special levers designed for kids' hands, the hydraulic disc brakes increase safety and control on rough terrain and in wet conditions
- Flip-flop design allows the stem to be mounted upside down to adjust the handlebar height, ensuring the perfect hand position and fit
- Quick-release seatpost clamp allows the saddle to be adjusted with ease while remaining secure
- Ergonomic contact points are made specifically for kids because comfort is important to the riding experience
- Custom-size saddle is designed to accommodate their biomechanics; tapered handlebar ends and custom grips are ergonomically designed for small hands, with off-roading in mind
- Pedals are durable, reflective and feature slip-resistant pins for extra traction
- Ultralight aluminum frame with butted hydroformed tubes has a long wheelbase, sporty geometry and slack steering angle
- The bend in the top tube makes it easy to dismount quickly in any situation; cable port on the seat tube allows for the addition of an internally routed dropper seatpost
- High-quality Schwalbe mountain bike tires offer an ideal combination of low rolling resistance, maximum grip, ample shock absorption and excellent durability
- Together, the rims and Schwalbe tires are tubeless compatible
- NOTE: Specs and images are subject to change based on component availability
Imported.
- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- An additional year of free adjustments on e-bikes
- 20% off shop services
- Free tubes with purchase of flat tire repair (Co-op Cycles brand tubes only; tube must be installed at time of purchase)
New bikes go through a normal break-in period, after which they should be readjusted. All electric bicycles sold at REI include free adjustments for the defined period (one year after purchase date for non-members, or two years for REI Co-op Members)—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation, chain lubrication and e-bike firmware updates. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
UL2849 certified
| Best Use | Mountain Biking |
|---|---|
| Motor | Fazua drive system |
| Motor Type | Mid-Drive |
| Motor Torque (Nm) | 58 Newton meters |
| Battery Type | Lithium Ion |
| Battery Capacity (Wh) | 250 watt hours |
| Battery Removable | Yes |
| Charge Time (hrs) | 4-6 hours |
| Pedal Assist Range | Up to 35 miles |
| Mountain Bike Style | All-mountain |
| Frame | Lightweight, high-quality 6061 T6 aluminum with butted and hydroformed tubes |
| Bike Suspension | Front Suspension |
| Fork | F1RST hydraulic air suspension fork with adjustable compression and rebound damping, plus lockout; 1 to 1-1/8 in. tapered steerer tube; 100 x 15 mm thru axle; post mount for disc brakes |
| Fork Travel | 80 millimeters |
| Crankset | Lightweight, forged aluminum 5.1 in. (130 mm) kid-specific cranks with narrow tread (Q-factor) |
| Bottom Bracket | Fazua bottom bracket houses dual-sided torque and cadence sensors for natural-feeling engagement of drive system |
| Shifters | SRAM NX trigger |
| Rear Derailleur | SRAM NX |
| Rear Cogs | 11-speed, 11-42T cassette |
| Number of Gears | 11 gear(s) |
| Brake Type | Hydraulic Disc Brake |
| Brakes | Promax hydraulic disc brakes |
| Brake Levers | Ergonomic brake levers designed for kids' hands |
| Rims | Tubeless-compatible Alexrims wheelset |
| Front Hub | Front hub for disc brake; 20h, 14 gauge, 100 x 15 mm; 2x bearings without quick release |
| Rear Hub | Rear hub for disc brake; 20h, 14 gauge, 135 x 12 mm; alloy cassette body; 4x sealed bearings without quick release |
| Wheel Size | 24 inches |
| Tires | Schwalbe Rocket Ron with ADDIX SPEED rubber compound |
| Tire Width | 2.35 inches |
| Handlebar Shape | Riser Bar |
| Handlebar | Wide, ergonomically adapted and lightweight aluminum bars for more control; tapered ends to fit kids' hands; sandblasted and silver anodized; 585 mm wide; 20 mm rise |
| Stem | Forged aluminum and CNC-machined; handlebars attached via 2 clamps; +/-15-deg. rise/drop with flip-flop design to adjust handlebar height; 50 mm length |
| Seat Post | Anodized aluminum seatpost with quick-release clamp and insertion marks to indicate the minimum insertion depth; 27.2 x 250 mm |
| Saddle | Ergonomically designed to fit kids' anatomy; streamlined mountain-bike specific saddle design with side protection to lean against walls |
| Pedals | Black flat pedals made from fiber-reinforced nylon; 2 x 6 pins; chromoly axle |
| Headset | Fully integrated 1 to 1-1/8 in. headset with sealed industrial bearings |
| Chain | KMC X9 NPGY 1/2 in. x 11/128 in. |
| Weight | 35 lbs. 4.8 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Kids' |
| 24 IN | |
|---|---|
| Height Range | 4'2" - 4'9'' |
How we measure bikes
- Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
- Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
- Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
- Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
- Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
- Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
- Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
- Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
- Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
- Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
- Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
- Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.