Bicycle Archive · Specification report

2025 Rocky Mountain Reaper 20

Velopedia Archive ID 900000729

Overview

Model year	2025
Brand	Rocky Mountain
Model	Reaper 20
Bicycle type	Youth
Archive ID	900000729
Original MSRP	$2,599.00
Colors	Red/Blue/Black
Sizes	One Size

Frameset

Frame construction	FORM™ Alloy \| Full Sealed Cartridge Bearings \| Press Fit BB \| Internal Cable Routing \| 2-Bolt ISCG05 Tabs \| 120mm Travel \| FORM™ Alloy Rear Triangle
Frame material	Aluminum
Fork	Manitou J Unit Comp 120mm \| TPC Damper \| 20 = 40mm Offset
Rear shock	RockShox Deluxe Select \| Sealed Bearing Eyelet \| 20x8mm F Hardware \| 170x35mm

Drivetrain

Shifters	MicroShift Advent Short Reach 9spd
Rear derailleur	MicroShift Advent Super Short 9spd W/Clutch
Crankset	Rocky Mountain Microdrive 2PC \| 28T \| 104mm Asymmetrical BCD \| 24mm Spindle \| Crank Length = 127mm
Cassette	SunRace CSM98 11-36T
Chain	KMC X9

Brakes

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

Cockpit & contact points

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
Handlebar	Rocky Mountain Jr \| 640mm Width \| 25mm rise \| 9° Backsweep \| 5° Upsweep \| 31.8 \| For 19mm Grips
Stem	Rocky Mountain 31.8 AM \| 5° Rise \| All Sizes = 40mm
Saddle	Rocky Mountain Kids
Seatpost	Tranz X +RAD1.0 Adjustable Dropper Post \| 30mm Adjustment \| Alloy Clamp Lever \| 30.9mm \| 100mm

Wheels & tires

Hubs	Front: Shimano TC500 \| 15mm Boost; Rear: Shimano TC500 Boost 148mm
Rims	WTB KOM Team i30 TCS 2.0 \| 28H
Spokes	2.0 Stainless
Front tire	Kenda Regolith 20 x 2.4
Rear tire	Kenda Regolith 20 x 2.4
Wheel size	20"

Geometry · kids

Seat tube	235 mm
Effective top tube	454 mm
Head tube	100 mm
Head-tube angle	64°
Seat-tube angle	74.9°
Chainstay / rear center	360 mm
Bottom-bracket drop	330 mm
Reach	462 mm
Stack	598 mm
Standover height	960 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 22, 2026.