Bicycle Archive · Specification report

2009 Diamondback Session

Velopedia Archive ID 18983

Overview

Model year	2009
Brand	Diamondback
Model	Session
Bicycle type	BMX
Archive ID	18983
Colors	Brown, Blue
Sizes	20" TT

Frameset

Frame construction	TIG-welded
Frame material	Hi-tensile steel
Fork material	Hi-tensile steel, unicrown crown
Rear shock	N/A

Drivetrain

Component group	BMX
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	1-piece chromoly, 44 teeth
Bottom bracket	Loose ball
Cassette	Freewheel
Rear cogs	1-speed, 16 teeth
Chain	KMC Z410, 1/2 x 1/8"
Pedals	DB Sound alloy w/traction pins

Brakes

Brakes	Tektro 907 U-brake rear brakes, Tektro 2 finger rear levers

Cockpit & contact points

Headset	1 1/8" FSA Threadless
Handlebar	Hi-Ten 2-piece
Handlebar extensions	Not included
Stem	Alloy 4-bolt
Saddle	DB Padded Jump
Seatpost	Steel micro-adjust, 25.4mm diameter

Wheels & tires

Hubs	Steel 14mm axle
Rims	Alloy, 36-hole/48-hole
Spokes	14ga. (2.0mm)
Front tire	Front: 20 x 1.85" DB 304, Rear: 20 x 2.25" DB Cellblock
Wheel size	20" wheels

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