MountainVerified spec

2026 Trek Top Fuel 9.8 XT Di2 Gen 4

Launched at $6,500

Own a 2026 Trek Top Fuel 9.8 XT Di2 Gen 4?

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What a used one is worth

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New

$6,500

$6,500 to $6,500

Like new

$6,175

$6,175 to $6,175

Excellent

$5,850

$5,850 to $5,850

Good

$4,875

$4,875 to $4,875

Fair

$3,575

$3,575 to $3,575

For parts

$1,950

$1,950 to $1,950

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): $6,500

Drivetrain

Speeds: 12
Groupset: Shimano Deore XT Di2
Electronic: true

Build

Fork: RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
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 XT M8220 4-piston hydraulic disc
Saddle: Verse Short Comp, steel rails, 145mm width
Wheels: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5'' (S); Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'' (M, ML, L, XL)
Cassette: Shimano XT M8200, 10-51, 12 speed
Crankset: Shimano XT 8200, 30T, 55mm chainline, 170mm length
Seatpost: Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 310mm length (S); Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length (M, ML); Bontrager Line Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 515mm length (L, XL)
Shifters: Shimano XT Di2 M8250, 12 speed
Handlebar: Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
Weight kg: 14
Rear shock: RockShox Deluxe Ultimate RCT, 185mm x 50mm
Rear derailleur: Shimano XT M8250, 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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