Bicycle Archive · Specification report

2001 Diamondback Reactor EX

Velopedia Archive ID 36056

Overview

Model year	2001
Brand	Diamondback
Model	Reactor EX
Bicycle type	BMX
Archive ID	36056
Original MSRP	$329.99
Colors	Putty/Black
Sizes	Pro

Frameset

Frame construction	TIG-welded
Frame material	7005 aluminum
Fork	Diamondback RMX
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 175mm, 44 teeth
Bottom bracket	Sealed
Rear cogs	1-speed, 16 teeth
Chain	KMC HP-20, 1/2 x 3/32"
Pedals	Aluminum platform

Brakes

Brakes	Tektro 922A rear brakes, Tektro 312A rear levers

Cockpit & contact points

Headset	1 1/8" threadless Tange Seiki TG-3
Handlebar	Chromoly BMX
Handlebar extensions	Not included
Stem	Aluminum
Saddle	Padded BMX
Seatpost	Aluminum micro-adjust, 27.0mm diameter

Wheels & tires

Hubs	RMX aluminum sealed bearing
Rims	Alex X-202, 36-hole
Front tire	20 x 1.75" Tioga Comp III
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	495.3 mm
Head-tube angle	74°
Seat-tube angle	70°
Chainstay / rear center	368.3 mm

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