MountainVerified spec

2010 GT Marathon Carbon Pro

Launched at $4,300

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What a used one is worth

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New

$960

$487 to $1,303

Like new

$912

$463 to $1,238

Excellent

$864

$438 to $1,173

Good

$720

$365 to $977

Fair

$528

$268 to $717

For parts

$288

$146 to $391

From the launch price, aged to 2026 and adjusted for condition. Guidance from our catalog, not an appraisal.

Overview

Brand: GT
Model family: Marathon
Model year: 2010
Category: Mountain · trail
Frame material: carbon
Sizes: XS, S, M, L, XL
Wheel size: 26
Launch MSRP (US): $4,300

Drivetrain

Speeds: 9
Groupset: Shimano Deore XT
Electronic: false

Build

Fork: FOX 32 RL with 120mm of travel, rebound adjust and remote lock out
Stem: Ritchey Pro Axis 44 cold forged stem, with 6 degree rise, and 4 bolt face plate
Tires: Kenda Karma, 26x 2.0 120 TPI with Kevlar bead and DTC compound
Brakes: Shimano XT Hydraulic w / 160 mm rotor (front and rear); levers: XT seperate Hydraulic
Saddle: FIZIK Gobi XM with Manganese Rails
Wheels: rims: Mavic CrossTrail for Centerlock Disc; front hub: Mavic CrossTrail for Centerlock Disc; rear hub: Mavic CrossTrail for Centerlock Disc; spokes: Mavic
Cassette: Shimano XT Nine speed index cassette 11-32
Crankset: Shimano XT, with Hollowtech 2 piece arm and bb,
Seatpost: Ritchey 31.6mm 3 D forged
Shifters: Shimano XTR trigger
Handlebar: Ritchey Pro Lo Rizer butted 2014 alum, 31.8 mm clamp, 680 mm width 15mm rise, 6/9 deg sweep
Rear shock: Fox Float RP23 with rebound adjust lock out and adjustable pro pedal
Travel rear mm: 102
Rear derailleur: Shimano XT "Shadow"
Travel front mm: 120

Geometry

L: Chainstay mm: 430.5; Wheelbase mm: 1104.4; Head angle deg: 71; Seat angle deg: 73
M: Chainstay mm: 430.5; Wheelbase mm: 1081.6; Head angle deg: 71; Seat angle deg: 73
S: Chainstay mm: 430.5; Wheelbase mm: 1051.3; Head angle deg: 71; Seat angle deg: 73
XL: Chainstay mm: 430.5; Wheelbase mm: 1124.9; Head angle deg: 71; Seat angle deg: 73
XS: Chainstay mm: 430.5; Wheelbase mm: 1041; Head angle deg: 71; Seat angle deg: 73

Spec from GT's then current 2010 model page (US site, captured 2010-01; model year from GT's model code G10MARCP in the page title). Sizes from the page's geometry table. Rear travel printed in inches ("4 inches of travel"), converted. Frame: GT I drive 4 monocoque carbon fiber front triangle and rear traingle with 4 inches of travel. Integrated headset and main pivot bearings. Internal cable routing. Front derailleur: Shimano XT Bottom bracket: Shimano XT out board sealed bearings Chain: HG-73 Nine Speed Headset: FSA Integrated, sealed angular contact bearing Grips: GT Alloy Lock Down Seat clamp: GT Alum QR Nipples: Mavic MSRP $4299.99 read from the product's own price block (under the model name) on GT's US page captured 2010-01, inside the 2010 launch window (fix round 2026-10-21).

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