Bicycle Archive · Specification report

2021 Jamis XR24

Velopedia Archive ID 900001736

Overview

Model year	2021
Brand	Jamis
Model	XR24
Bicycle type	Youth
Archive ID	900001736
Original MSRP	$569.95
Colors	Gloss Black, Ninja Green, Sky Blue, Violet Powder
Sizes	12” B
Weight	24.00 lbs

Frameset

Frame construction	6061 aluminum main tubes, zero-stack head tube, over- sized stays, replaceable derailleur hanger
Frame material	Aluminum
Fork	Unicrown, hi-tensile steel, 28.6 steerer
Fork material	Steel

Drivetrain

Component group	Shimano TY300 rear
Shifters	Shimano RevoShift 35, 7-speed
Rear derailleur	Shimano TY300 rear
Crankset	Forged alloy crank, 152mm, 32T chainring and protective outer rock-ring
Bottom bracket	Sealed cartridge
Cassette	Shimano TZ500 freewheel, 14-28, 7-speed
Chain	KMC Z51
Pedals	MTB platform, hi-impact resin

Brakes

Brakes	Alloy linear pull type with Tektro youth specific levers

Cockpit & contact points

Headset	Zero-stack internal cup threadless, 15mm cone spacer
Handlebar	MTB alloy riser, 6 ̊ sweep x 20mm rise x 580mm wide
Stem	MTB alloy threadless, 15 ̊ rise x 60mm extension
Saddle	Jamis ATB Youth
Seatpost	Alloy micro-adjust, 27.2 x 300mm, with 31.8mm alloy clamp

Wheels & tires

Wheels	Alloy 36H black anodized rims with brushed brake tracks, alloy MTB hubs with nutted axles, 14G black electroplated spokes
Front tire	CST MTB Sport, 24 x 1.95”
Rear tire	CST MTB Sport, 24 x 1.95”
Wheel size	24

Geometry · 12” B

Effective top tube	523 mm
Head tube	100 mm
Head-tube angle	70°
Seat-tube angle	72°
Chainstay / rear center	410 mm
Wheelbase	981 mm
Bottom-bracket height	261 mm
Standover height	561 mm
Fork offset / rake	45 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 13, 2026.