Bicycle Archive · Specification report

2001 DirtMaster H.F.O.

Velopedia Archive ID 35134

Overview

Model year	2001
Brand	DirtMaster
Model	H.F.O.
Bicycle type	Freestyle/jumping
Archive ID	35134
Original MSRP	$529.00
Colors	Black, White
Sizes	Pro
Weight	36 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	3-piece aluminum/chromoly, 44 teeth
Bottom bracket	Three piece, sealed
BB shell width	American
Rear cogs	1-speed, 16 teeth
Chain	KMC Z410, 1/2 x 1/8"
Pedals	Radix

Brakes

Brakes	Dia-Compe 990 rear brakes, Dia-Compe Tech 99 rear levers

Cockpit & contact points

Headset	1 1/8" threadless Aheadset-Tank
Handlebar	DirtMaster Hoochie Bar
Handlebar extensions	N/A
Stem	Radix
Saddle	Radix
Seatpost	Radix, 25.4mm diameter

Wheels & tires

Hubs	Radix
Rims	Alex Supra Alpha, 48-hole
Spokes	Chung Nan stainless steel, 2.0mm straight gauge
Spoke nipples	Brass nipples
Front tire	20 x 2.25" Radix
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	527 mm
Head-tube angle	75°
Seat-tube angle	71°
Chainstay / rear center	368.3 mm
Wheelbase	927.1 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 October 1, 2026.