Bicycle Archive · Specification report

2009 Diamondback RM 12

Velopedia Archive ID 18976

Overview

Model year	2009
Brand	Diamondback
Model	RM 12
Bicycle type	Juvenile
Archive ID	18976
Colors	Gloss Red

Frameset

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

Drivetrain

Component group	Juvenile Mix
Shifters	N/A
Front derailleur	N/A
Rear derailleur	N/A
Crankset	1-piece, 28 teeth
Bottom bracket	Loose ball
Cassette	Cog
Rear cogs	1-speed, 18 teeth
Pedals	Resin platform

Brakes

Brakes	Coaster brake rear

Cockpit & contact points

Headset	1" Threaded
Handlebar	Hi-Ten 2-piece
Handlebar extensions	Not included
Stem	Steel quill
Saddle	DB Jr Padded
Seatpost	Steel pillar, 25.4mm diameter

Wheels & tires

Hubs	Front: Nutted, Rear: Nutted Coaster
Rims	Alex R-1000, 16-hole
Spokes	14ga. (2.0mm)
Front tire	12 x 2.125" Comp III style
Wheel size	12" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 24, 2026.