MountainVerified spec

2025 Trek Top Fuel 9.8 XT Gen 4

Launched at $6,250

Own a 2025 Trek Top Fuel 9.8 XT Gen 4?

Track its value in your garage, or list it for sale locally in a few taps.

What a used one is worth

New

$4,875

$3,437 to $5,625

Like new

$4,631

$3,266 to $5,344

Excellent

$4,387

$3,094 to $5,062

Good

$3,656

$2,578 to $4,219

Fair

$2,681

$1,891 to $3,094

For parts

$1,462

$1,031 to $1,687

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

Fork: RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
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 M8120 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 M8100, 10-51, 12 speed
Crankset: Shimano XT M8120, 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, L, XL)
Shifters: Shimano XT M8100, 12 speed
Weight kg: 13.45
Rear shock: RockShox Deluxe Ultimate RCT, 185mm x 50mm
Rear derailleur: Shimano XT M8100, long cage
Travel front mm: 130

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, 2024-08 capture.

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