Rocky Mountain Reaper 20
Built for trail riding, the Reaper 20 combines a durable FORM™ alloy frame, 120mm front and rear travel, and a suspension platform designed for real off-road use. Designed for younger riders getting into trail riding, it delivers control on descents while maintaining efficient pedaling for progression and longer rides.
Key highlights
- 120mm front / 120mm rear travel built for real trail riding and skill progression.
- FORM™ alloy suspension platform for traction and control on rough terrain.
- 20" wheels for responsive handling and confidence at lower rider weights.
- MicroShift Advent 9-speed drivetrain designed for durability and simple, reliable shifting.
Design and durability
- FORM™ alloy frame with 120mm rear travel.
- Full sealed cartridge bearings with internal cable routing.
- Compact geometry built for control and stability.
- ISCG05 tabs for chain retention and added durability.
Ride characteristics
- Stable and confidence-inspiring on steeps, roots, and technical trails.
- Modern geometry helps maintain control through rough terrain.
- Efficient pedaling platform for longer rides and steady climbing.
- Scaled components designed specifically for smaller riders.
Fit, setup, and recommended upgrades
- We want every rider to get the most out of their new Reaper 20.
- Local pickup customers: We can help dial in suspension setup and cockpit fit before the first ride.
- Shipped bikes: Bikes arrive professionally assembled and test ridden. Our staff can assist with setup questions if needed.
- Recommended upgrades: Many riders choose pedals, tubeless setup, and frame protection to match local trails.
Rocky Mountain Reaper 20 – Full specifications
Frame
| Frame | FORM™ Alloy | 120mm Travel | Internal Cable Routing | ISCG05 Tabs |
Suspension
| Fork | Manitou JUNIT Comp, 120mm travel, 40mm offset |
| Rear shock | RockShox Deluxe Select, 170x35mm |
Wheels & tires
| Rims | WTB KOM Team i30 TCS 2.0, 28H |
| Front hub | Shimano TC500 Boost 15mm |
| Rear hub | Shimano TC500 Boost 148mm |
| Tires | Kenda Regolith 20 x 2.4 (F/R) |
Drivetrain
| Shifter | MicroShift Advent Short Reach 9-speed |
| Rear derailleur | MicroShift Advent Super Short with clutch |
| Crankset | Rocky Mountain Microdrive 2PC, 28T, 127mm |
| Cassette | SunRace 11-36T |
| Chain | KMC X9 |
Brakes
| Brakes | Tektro HD-J2820 hydraulic disc, short reach levers |
| Rotors | Shimano compatible |
Cockpit
| Handlebar | Rocky Mountain Jr, 640mm width, 25mm rise |
| Stem | Rocky Mountain AM, 40mm |
| Seatpost | TranzX dropper post, 100mm |
| Saddle | Rocky Mountain Kids |
Frame geometry (mm and degrees)
| Size | 20 |
|---|---|
| Travel (front/rear) | 120 / 120 |
| Reach | 462 |
| Stack | 598 |
| Head tube angle | 64° |
| Seat tube angle | 74.9° |
| Rear centre | 360 |
| Standover | 960 |
Component note: We reserve the right to make changes to product and component information at any time without notice.
