Bicycle Archive · Specification report

2002 Hoffman Pro Dirty 1 Thirty

Velopedia Archive ID 91521

Overview

Model year	2002
Brand	Hoffman
Model	Pro Dirty 1 Thirty
Bicycle type	Freestyle/jumping
Archive ID	91521
Original MSRP	$700.00
Colors	Blue, Raw, Tan
Weight	36.5 lb

Frameset

Frame construction	TIG-welded
Frame material	4130 chromoly
Fork	Hoffman Dirty 1 Thirty
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	Primo Powerbite, 39 teeth
Rear cogs	1-speed, 14 teeth
Chain	KMC 410, 1/2 x 1/8"
Pedals	Wellgo LU-313

Brakes

Brakes	DiaTech 996 U-Brake rear brakes, Dia-Compe Tech 99 rear levers

Cockpit & contact points

Headset	1 1/8" threadless Aheadset Tank
Handlebar	Hoffman Jumping Bars
Handlebar extensions	N/A
Stem	Hoffman Fist
Saddle	Hoffman Padded Embossed Skull
Seatpost	Chromoly micro-adjust, 25.4mm diameter

Wheels & tires

Hubs	Front: Hoffman Highroller Hub 3/8", Rear: Hoffman Highroller Hub 14mm
Rims	Hoffman HighRoller, 48-hole
Spokes	Stainless steel, 14ga. (2.0mm) straight gauge
Spoke nipples	Alloy nipples
Front tire	20 x 1.95" Primo
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	527 mm
Head-tube angle	74°
Seat-tube angle	70°

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 2, 2026.