Bicycle Archive · Specification report

2009 Rocky Mountain Flatline Unlimited

Velopedia Archive ID 18843

Overview

Model year	2009
Brand	Rocky Mountain
Model	Flatline Unlimited
Bicycle type	Mountain bike, front & rear suspension
Archive ID	18843
Colors	Copper
Sizes	Xsmall, small, medium, large

Frameset

Frame construction	TIG-welded
Frame material	RMB FORM 7005 Aluminum w/hydroformed DT
Fork	Marzocchi 66 RCV, 180mm travel
Fork material	Single
Rear shock	Fox DHX 3.0, 170 - 213mm travel

Drivetrain

Component group	SRAM Hammerschmidt
Shifters	SRAM X.9 Trigger
Front derailleur	Internally Geared Crank
Rear derailleur	SRAM X.9
Crankset	TruVativ Hammerschmidt
Bottom bracket	TruVativ Hammerschmidt FR
Cassette	SRAM PG-950
Rear cogs	9-speed, 11 - 32 teeth
Chain	SRAM PC-951
Pedals	RMB flat

Brakes

Brakes	Shimano M575 disc brakes, Shimano M575 Hydraulic levers

Cockpit & contact points

Headset	1 1/8" - 1 1/2" integrated FSA Orbit Z 1.5R
Handlebar	RMB Alloy DH riser
Handlebar extensions	Not included
Stem	RMB DH alloy 31.8mm
Saddle	WTB Pure V Race
Seatpost	RMB SP-601 2-bolt, 30.9mm diameter

Wheels & tires

Hubs	Front: Wheeltech cartridge disc 20mm axle, Rear: Wheeltech cartridge disc w/12mm thru-axle
Rims	Mavic EX325
Spokes	DT Swiss Champion
Front tire	Front: 26 x 2.50" WTB Prowler MX Comp, Rear: 26 x 2.50" WTB Dissent Comp
Wheel size	26" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 12, 2026.