Bicycle Archive · Specification report

2001 Hoffman Star Dirty 1 Thirty

Velopedia Archive ID 90658

Overview

Model year	2001
Brand	Hoffman
Model	Star Dirty 1 Thirty
Bicycle type	Freestyle/jumping
Archive ID	90658
Original MSRP	$399.99
Colors	Black, Dark Blue, Red
Sizes	Pro
Weight	36 lb

Frameset

Frame construction	TIG-welded
Frame material	4130 chromoly
Fork	Hoffman Bikes Super fork
Fork material	4130 chromoly
Rear shock	N/A

Drivetrain

Component group	N/A
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	1-piece 170mm, 44 teeth
Bottom bracket	One piece
Rear cogs	1-speed, 16 teeth
Chain	KMC 410, 1/2 x 1/8"
Pedals	Wellgo LU-313

Brakes

Brakes	DiaTech 996 U-brake brakes, Dia-Compe MX99 front/Dia-Compe MX99 rear levers

Cockpit & contact points

Headset	1 1/8" threadless Dia-Tech SBN
Handlebar	Hoffman Bikes Jumping Bar
Handlebar extensions	N/A
Stem	Custom
Saddle	Hoffman Bikes Flame Seat
Seatpost	Chromoly micro-adjust, 25.4mm diameter

Wheels & tires

Hubs	Keyin aluminum
Rims	HoffmanBikes HighRoller Rim Cp, 48-hole
Spokes	Stainless steel, 2.0mm straight gauge
Spoke nipples	Aluminum nipples
Front tire	20 x 1.95" Hoffman Bikes Skidmarks
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	528.3 mm
Head-tube angle	74°
Seat-tube angle	70°
Chainstay / rear center	381 mm
Wheelbase	914.4 mm
Fork offset / rake	35.6 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 1, 2026.