MountainVerified spec

2026 Trek Top Fuel 9.9 XTR Di2 Gen 4

Launched at $10,000

Own a 2026 Trek Top Fuel 9.9 XTR Di2 Gen 4?

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What a used one is worth

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New

$10,000

$10,000 to $10,000

Like new

$9,500

$9,500 to $9,500

Excellent

$9,000

$9,000 to $9,000

Good

$7,500

$7,500 to $7,500

Fair

$5,500

$5,500 to $5,500

For parts

$3,000

$3,000 to $3,000

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

Overview

Brand: Trek
Model family: Top Fuel
Model year: 2026
Category: Mountain · trail
Frame material: carbon
Sizes: S, M, ML, L, XL
Wheel size: 27.5/29
Wheel setup: by frame size
Launch MSRP (US): $10,000

Drivetrain

Speeds: 12
Groupset: Shimano XTR Di2
Electronic: true

Build

Fork: RockShox Pike Ultimate, DebonAir spring, Charger 3.1 RC2 damper, 44mm offset, Boost110, Maxle Stealth, 130mm travel (S); Fox Factory 36 SL, Float EVOL air spring, GRIP X damper, 44mm offset, Boost 110, 15mm Kabolt X axle, 130mm travel (M, ML, L, XL)
Stem: Bontrager Line Pro, 35mm, Blendr compatible, 0 degree, 35mm length
Tires: Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40'' (S); Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'' (M, ML, L, XL); Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40'' (M, ML, L, XL)
Brakes: Shimano XTR M9220 4-piston hydraulic disc
Saddle: Verse Short Pro, carbon rails, 145mm width
Wheels: Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5'' (S); Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' (M, ML, L, XL)
Cassette: Shimano XTR M9200, 10-51, 12 speed
Crankset: E*thirteen Helix Race Carbon, 30T, 55mm chainline, 170mm length
Seatpost: Fox Transfer NEO, 150mm travel, 34.9 (S, M); Fox Transfer NEO, 175mm travel, 34.9 (ML); Fox Transfer NEO, 200mm travel, 34.9 (L, XL)
Shifters: Shimano XTR Di2 M9250, 12 speed
Handlebar: Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
Weight kg: 13.1
Rear shock: Fox Factory Float, 2- position damper, 185mm x 50mm
Rear derailleur: Shimano XTR Di2 M9250, long cage
Travel front mm: 130

Geometry

L: Reach mm: 482; Stack mm: 608; Chainstay mm: 439; Wheelbase mm: 1227; Head angle deg: 65.9; Seat angle deg: 76.3
M: Reach mm: 452; Stack mm: 599; Chainstay mm: 434; Wheelbase mm: 1188; Head angle deg: 65.9; Seat angle deg: 77.3
S: Reach mm: 422; Stack mm: 566; Chainstay mm: 434; Wheelbase mm: 1150; Head angle deg: 65.9; Seat angle deg: 76.5
ML: Reach mm: 467; Stack mm: 604; Chainstay mm: 439; Wheelbase mm: 1210; Head angle deg: 65.9; Seat angle deg: 76.6
XL: Reach mm: 512; Stack mm: 626; Chainstay mm: 444; Wheelbase mm: 1270; Head angle deg: 65.9; Seat angle deg: 75.6

Price as shown on Trek's US site, 2025-08 capture.

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