Bicycle Archive · Specification report

1999 Dahon Rock Hard XT612

Velopedia Archive ID 81162

Overview

Model year	1999
Brand	Dahon
Model	Rock Hard XT612
Bicycle type	Folding
Archive ID	81162
Original MSRP	$349.00
Colors	Red
Sizes	17"
Weight	32 lb

Frameset

Frame construction	TIG-welded
Frame material	Hi-tensile steel
Rear shock	N/A

Drivetrain

Component group	Shimano Tourney TY-22
Shifters	Grip Shift MRX-100
Front derailleur	Shimano Tourney TY-22 top-swing, bottom-pull
Rear derailleur	Shimano Tourney TY-22
Crankset	Dotek, 24/34/46 teeth
Rear cogs	7-speed, 14 - 28 teeth
Chain	KMC HP-20, 1/2 x 3/32"
Pedals	Resin

Brakes

Brakes	Vanguard linear-pull

Cockpit & contact points

Headset	1"
Handlebar extensions	N/A
Seatpost	Kalloy aluminum, 25.8mm diameter

Wheels & tires

Hubs	Alloy
Rims	Aluminum, 36-hole
Spokes	Steel, straight gauge
Spoke nipples	Brass nipples
Front tire	26 x 1.95"
Wheel size	26" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 29, 2026.