Trek Top Fuel 8 Gen 4 2026

C$5,299.99
Availability: Out of stock

Top Fuel 8 Gen 4 is a nimble alloy trail bike that strikes a balance between quick climbing efficiency and descending confidence. It packs in a versatile 130mm front and 120mm rear travel for ripping over rocks and roots without sacrificing power on ascents. It's built from lightweight Alpha Platinum Aluminum that helps save your budget for bike trips, but packs in upgrades where they matter, like a 12-speed Shimano XT and SLX drivetrain, and a Fox Rhythm 34 fork.

Frame
Alpha Platinum Aluminum, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120mm travel
Fork
Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 130mm travel
Shock
Fox Performance Float DPS, 2-position damper, 185mm x 50mm

*Wheel front
*Wheel rear
Size: S
Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano Micro Spline freehub, Boost148, 12mm thru axle, 27.5''
Size: S
Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano Micro Spline freehub, Boost148, 12mm thru axle, 27.5"
Size: M, ML, L, XL
Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano Micro Spline freehub, Boost148, 12mm thru axle, 29''
Size: M, ML, L, XL
Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano Micro Spline freehub, Boost148, 12mm thru axle, 29"
Skewer rear
*Tire
Size: S
Bontrager Gunnison Pro XR, Tubeless Ready, wire bead, 60 tpi, 27.5x2.40''
Size: M, ML, L, XL
Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29x2.40''
Tire part
Bontrager TLR sealant, 180 ml/6 oz
Max tire size
Frame: 29x2.50", Fork: See manufacturer

Shifter
Shimano XT M8100, 12 speed
Rear derailleur
Crank
Shimano Deore M6120, 30T ring, 55 mm chainline, 170 mm length
Bottom bracket
Shimano BB-MT501 BSA
Cassette
Chain
Shimano SLX M7100, 12 speed
Max chainring size
1x: 34T, min 30T

Saddle
Bontrager Verse P3, chromoly rails
*Seatpost
Handlebar
Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
*Grips
Size: S , M, ML, L, XL
Trek Line Comp, nylon lock-on
Stem
*Brake
Size: S , M, ML, L, XL
Shimano M6120 4-piston hydraulic disc
Size: S , M, ML, L, XL
Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper
Brake rotor
Shimano RT66, 6-bolt, 180mm
Rotor size
Max brake rotor sizes - Frame: 200mm, min 180mm, Fork: see fork manufacturer

Weight
M - 14.58 kg / 32.15 lbs (with TLR sealant, no tubes)
Weight limit
This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
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