Bicycle Archive · Specification report

2002 Diamondback RM20

Velopedia Archive ID 91753

Overview

Model year	2002
Brand	Diamondback
Model	RM20
Bicycle type	BMX
Archive ID	91753
Original MSRP	$500.00
Colors	Red/White
Sizes	Pro

Frameset

Frame construction	TIG-welded
Frame material	7005 aluminum
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	AC Race 16 3pc, 44 teeth
Bottom bracket	AC Euro Sealed Bearing
BB shell width	68mm English
Rear cogs	1-speed, 16 teeth
Chain	KMC HP20NP, 1/2 X 3/32"
Pedals	Aluminum

Brakes

Brakes	Tektro BX-20 linear-pull rear brakes, Tektro Sabre rear levers

Cockpit & contact points

Headset	1 1/8" threadless aluminum
Handlebar	Chromoly BMX
Handlebar extensions	N/A
Stem	Aluminum
Saddle	Diamondback BMX
Seatpost	Aluminum, 27.0mm diameter

Wheels & tires

Hubs	Aluminum
Rims	Alex Supra B Pro, 36-hole
Spokes	Stainless steel, 14ga. (2.0mm) straight gauge
Spoke nipples	Brass nipples
Front tire	Front: 20 x 2.125" Tioga Comp III, Rear: 20 x 1.75" Tioga Comp III
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	539.8 mm
Head-tube angle	73.5°
Seat-tube angle	71°
Chainstay / rear center	393.7 mm
Wheelbase	985.5 mm
Fork offset / rake	30.5 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 27, 2026.