MountainVerified spec

2025 Trek Top Fuel 8 Gen 4

Launched at $4,000

Own a 2025 Trek Top Fuel 8 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

$3,120

$2,200 to $3,600

Like new

$2,964

$2,090 to $3,420

Excellent

$2,808

$1,980 to $3,240

Good

$2,340

$1,650 to $2,700

Fair

$1,716

$1,210 to $1,980

For parts

$936

$660 to $1,080

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

Fork: Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 130mm travel
Stem: Bontrager Elite, 35mm, 0 degree, 45mm length
Tires: Bontrager Gunnison Pro XR, Tubeless Ready, wire bead, 60 tpi, 27.5x2.40'' (S); Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40'' (M, ML, L, XL)
Brakes: Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper
Saddle: Bontrager Verse P3, chromoly rails
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 SLX M7100, 10-51T, 12 speed
Crankset: Shimano Deore M6120, 30T ring, 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
Handlebar: Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
Weight kg: 14.58
Rear shock: Fox Performance Float DPS, 2-position damper, 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
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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