Bicycle Archive · Specification report

2001 DirtMaster Jump

Velopedia Archive ID 35130

Overview

Model year	2001
Brand	DirtMaster
Model	Jump
Bicycle type	Freestyle/jumping
Archive ID	35130
Original MSRP	$339.00
Colors	Blue, Red
Sizes	Pro
Weight	28 lb

Frameset

Frame construction	TIG-welded
Frame material	Chromoly
Fork	DirtMaster
Fork material	Chromoly, unicrown crown
Rear shock	N/A

Drivetrain

Component group	N/A
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	1-piece 180mm, 44 teeth
Bottom bracket	Yst
BB shell width	American
Rear cogs	1-speed, 16 teeth
Chain	KMC Z410, 1/2 x 1/8"
Pedals	Radix

Brakes

Brakes	Tektro U brake rear brakes, Tektro 271A rear levers

Cockpit & contact points

Headset	1 1/8" threadless Tioga TG
Handlebar	DirtMaster Hoochie Bar
Handlebar extensions	Not included
Stem	Radix
Saddle	Radix
Seatpost	Radix, 25.4mm diameter

Wheels & tires

Hubs	Radix
Rims	Alex MX 22, 48-hole
Spokes	Chung Nan UCP, 2.0mm straight gauge
Spoke nipples	Brass nipples
Front tire	20 x 2.25" Radix Dirt
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	527 mm
Head-tube angle	75°
Seat-tube angle	62°
Chainstay / rear center	355.6 mm
Wheelbase	938.5 mm
Fork offset / rake	31.8 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 29, 2026.