Bicycle Archive · Specification report

2003 Diamondback Session

Velopedia Archive ID 39394

Overview

Model year	2003
Brand	Diamondback
Model	Session
Bicycle type	Freestyle/jumping
Archive ID	39394
Original MSRP	$179.99
Colors	Black, Olive Drab
Sizes	Expert

Frameset

Frame construction	TIG-welded
Frame material	Chromoly seat tube/hi-tensile steel
Fork material	Chromoly
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
BB shell width	American
Rear cogs	1-speed, 16 teeth
Chain	KMC Z410, 1/2 x 1/8"
Pedals	Aluminum platform

Brakes

Brakes	Aluminum U-brake rear brakes, aluminum rear levers

Cockpit & contact points

Headset	1 1/8" threadless FSA
Handlebar	Chromoly BMX
Handlebar extensions	N/A
Stem	Aluminum
Saddle	Diamondback BMX
Seatpost	Aluminum, 25.4mm diameter

Wheels & tires

Hubs	Aluminum
Rims	Aluminum, 48-hole
Spokes	Stainless steel, 14ga. (2.0mm) straight gauge
Spoke nipples	Brass nipples
Front tire	Front: 20 x 2.125" DB Crazy Train, Rear: 20 x 1.95" DB Crazy Train
Wheel size	20" wheels

Geometry · Legacy reference

Top tube	508 mm
Head-tube angle	73.5°
Seat-tube angle	71°
Chainstay / rear center	374.6 mm
Wheelbase	927.1 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 28, 2026.