Bicycle Archive · Specification report

2010 Jamis X-20

Velopedia Archive ID 19633

Overview

Model year	2010
Brand	Jamis
Model	X-20
Bicycle type	Juvenile mountain bike, suspension
Archive ID	19633
Colors	Black/White
Sizes	Boys 10"

Frameset

Frame construction	TIG-welded
Frame material	7005 aluminum
Fork	Suspension, 40mm travel
Fork material	Single crown
Rear shock	N/A

Drivetrain

Component group	Mountain Mix
Shifters	Shimano RevoShift SL-RS35
Front derailleur	N/A
Rear derailleur	Shimano TX30 Short Cage
Crankset	Forged Alloy w/chainguard, 36 teeth
Bottom bracket	Cotterless Type 3PB axle, 119mm spindle
BB shell width	68mm
Cassette	Indexed freewheel
Rear cogs	6-speed, 14 - 28 teeth
Chain	KMC HP20, 1/2 x 3/32"
Pedals	ATB style

Brakes

Brakes	Alloy Linear Pull brakes, alloy short reach levers

Cockpit & contact points

Headset	1 1/8" threadless Aheadset
Handlebar	ATB tapered
Handlebar extensions	Not included
Stem	Jamis Threadless
Saddle	XC ATB
Seatpost	Alloy Pillar, 27.2mm diameter

Wheels & tires

Hubs	Heavy Duty ATB with Nutted Axles
Rims	Alloy, 36-hole
Spokes	Nickel-plated, 14ga. (2.0mm)
Front tire	20 X 1.95" CST ATB
Wheel size	20" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 24, 2026.