The Ultimate Guide to Buying a Kids' Bike
Big Creek Mountain Bike Park
Rocky Mountain Growler Jr 20 Kids' Mountain Bike
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Whether your kid is hopping off curbs or charging rowdy singletrack, the Rocky Mountain Growler Jr 20 kids' mountain bike sets them up right to ride hard and have fun doing it.
Shop similar productsKey Details
Wheel Size
20 inches
Fork Travel
60 millimeters
Number of Gears
8 gear(s)
- A burly hardtail best for experienced junior riders who aren't afraid to go big
- FORM™ alloy tubesets utilize premium materials to meet strict requirements
- Each FORM tube is engineered for its specific purpose within the frame, ensuring optimized strength, weight and ride quality
- NOTE: Specs and images are subject to change based on component availability
Imported.
This bike comes with Coast to Coast Support, which includes:
New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
View all Rocky Mountain Kids' Bikes- 1 year of free adjustments (see more below)
- In-store bike assembly
- Pickup in store or curbside
- Bike experts available at 170+ bike shops
- 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 bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.
| Best Use | Mountain Biking |
|---|---|
| Frame | Rocky Mountain 6061 alloy |
| Step-Through | No |
| Mountain Bike Style | Trail |
| Bike Suspension | Front Suspension |
| Fork | Suntour XCT JR 63 mm |
| Fork Travel | 60 millimeters |
| Crankset | Rocky Mountain Microdrive 3PC; 28T; SRAM 76 mm BCD; crank length: 127 mm |
| Bottom Bracket | Sealed Cartridge Bearing |
| Shifters | SunRace DLM403 Trigger |
| Rear Derailleur | SunRace RDM903 with clutch |
| Rear Cogs | SunRace CSM680 11-40T |
| Number of Gears | 8 gear(s) |
| Brake Type | Mechanical Disc Brake |
| Brakes | Tektro HD-M276; short reach lever; Shimano pad compatible |
| Brake Levers | Tektro HD-M276; short reach lever; Shimano pad compatible |
| Rims | Rocky Mountain JR30 tubeless; 32H; tubeless compatible (tape/valves/sealant not included) |
| Front Hub | Rocky Mountain QR |
| Rear Hub | Rocky Mountain QR |
| Wheel Size | 20 inches |
| Tires | Front: Kenda Kadre 20 x 2.6 in.; rear: Kenda Amrak 20 x 2.4 in. |
| Tire Width | 2.6 inches 2.4 inches |
| Handlebar Shape | Flat Bar |
| Handlebar | Rocky Mountain Jr; 600 mm width; 25 mm rise; 9 deg. backsweep; 5 deg. upsweep; 31.8; for 19 mm grips |
| Stem | Rocky Mountain 31.8 XC; 7 deg. rise; 40 mm |
| Seat Post | Rocky Mountain Pivotal 30.9 mm |
| Saddle | Rocky Mountain Pivotal |
| Pedals | Nylon platform |
| Headset | Rocky Mountain ZS44|56; loose ball bearings; 1-1/8 in. Crown Race |
| Chain | KMC Z8.3 |
| Weight | 23 lbs. 2.3 oz. |
| Bike Weight | Bike weight is based on median size, as sold, or the average of two median sizes. |
| Gender | Kids' |
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