Bicycle Archive · Specification report

2009 GT Marathon 9r

Velopedia Archive ID 18633

Overview

Model year	2009
Brand	GT
Model	Marathon 9r
Bicycle type	Mountain bike, front & rear suspension
Archive ID	18633
Original MSRP	$2,399.99
Colors	Dark Blue
Sizes	Medium, large, xlarge

Frameset

Frame construction	TIG-welded
Frame material	GT I-Drive 4 6061 Aluminum
Fork	RockShox Reba SL Dual Air 29er, 100mm travel
Fork material	Alloy, single crown
Rear shock	RockShox Monarch 3.1

Drivetrain

Component group	Shimano SLX
Shifters	Shimano SLX RapidFire
Front derailleur	Shimano SLX
Rear derailleur	Shimano SLX
Crankset	Shimano SLX, 22/32/44 teeth
Bottom bracket	Shimano SLX Hollowtech II
Cassette	Shimano SLX
Rear cogs	9-speed, 11 - 34 teeth
Chain	Shimano HG73
Pedals	Shimano PD-M520

Brakes

Brakes	Shimano SLX disc w/160mm rotor brakes, Shimano SLX Hydraulic levers

Cockpit & contact points

Headset	1 1/8" TH IS-3E
Handlebar	Easton EA50 MonkeyBar
Handlebar extensions	Not included
Stem	Easton EA50 31.8
Saddle	WTB Pure V Race
Seatpost	Easton EA30

Wheels & tires

Hubs	Shimano SLX centerlock disc
Rims	WTB SpeedDisc All Mountain 29er
Spokes	DT Swiss stainless, 14/15ga. (2.0/1.8mm) butted
Spoke nipples	DT Brass
Front tire	29 x 2.10" Kenda Small Block Eight
Wheel size	29" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 28, 2026.