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2026 Rocky Mountain

Reaper 20

A 20″ aluminum frame mountain youth bike with mid-range components and tektro hydraulic disc brakes.
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Manufacturer Price

$2,699
FrameAluminum
SuspensionFull, 120 / 120mm
ForkManitou JUNIT Comp
ShockRockShox Deluxe Select
Wheels20″ Aluminum
Drivetrain1 × 9
GroupsetmicroSHIFT Advent
BrakesTektro Hydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Handling
nimblestable
Reaper 20
Other Mountain Youth bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

15 mph

Reaper 20

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Compare the full Reaper model range

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Reviews
Mountain Bike Action
ROCKY MOUNTAIN REAPER KIDS MOUNTAIN BIKE REVIEW - Mountain Bike Action Magazine

Jul 2023 · Ron Koch

Rocky Mountain is one of the latest to cater to the next generation with its Reaper line of full-suspension kids’ bikes that come in 24-, 26- and 27.5-inch-wheel versions.

Read Review

Geometry
Specs
Build
Frame

FORM™ Alloy | Full Sealed Cartridge Bearings | Press Fit BB | Internal Cable Routing | 2-Bolt ISCG05 Tabs | 120mm Travel | FORM™ Alloy Rear Triangle

ColorRed / Blue/black

Fork

Manitou J Unit Comp 120mm | TPC Damper | 20 = 40mm Offset

Travel120mm

Shock

RockShox Deluxe Select | Sealed Bearing Eyelet | 20x8mm F Hardware | 170x35mm

Travel120mm

Headset

FSA Orbit NO.57B | 36°x45° Bearings | 30.2mm x 41mm x 6.5mm Upper | 40mm x 51.8mm x 8.0mm Lower | 1.5" Crown Race

Stem

Rocky Mountain 31.8 AM | 5° Rise | All Sizes = 40mm

Handlebar

Rocky Mountain Jr | 640mm Width | 25mm rise | 9° Backsweep | 5° Upsweep | 31.8 | For 19mm Grips

Saddle

Rocky Mountain Kids

Seatpost

Tranz X +RAD1.0 Adjustable Dropper Post | 30mm Adjustment | Alloy Clamp Lever | 30.9mm | 100mm

TypeDropper

Grips

SDG Slater JR Lock On

Groupset
Rear Derailleur

MicroShift Advent Super Short 9spd W/Clutch

Crank

Rocky Mountain Microdrive 2PC | 28T | 104mm Asymmetrical BCD | 24mm Spindle | Crank Length = 127mm

Shifters

MicroShift Advent Short Reach 9spd

Cassette

SunRace CSM98 11-36T

Chain

KMC X9

Brakes

Tektro HD-J2820 | Short Reach Lever | Shimano Pad Compatible

TypeTektro Hydraulic Disc

Wheels
Rims

WTB KOM Team i30 TCS 2.0 | 28H

Spokes

2.0 Stainless

Front Hub

Shimano TC500 | 15mm Boost

Rear Hub

Shimano TC500 Boost 148mm

Tires

F: Kenda Regolith 20 x 2.4 | R: Kenda Regolith 20 x 2.4

Rider Notes
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First added May 21

Last updated May 26

Not listed for 18 days