The 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 130 mm front and 120 mm rear travel for ripping over rocks and roots without sacrificing power on ascents. It’s built from lightweight Alpha Platinum Aluminium 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 Aluminium, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120 mm travel Fork Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 130 mm travel Shock Fox Performance Float DPS, 2-position damper, 185 mm x 50 mm Max compatible fork travel 140 mm

*Wheel front Size: S
Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5″ Size: M, ML, L, XL
Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29″ *Wheel rear Size: S
Bontrager Line Comp 30, High Strength 6000 Series Aluminium rim, Tubeless-Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12 mm thru axle, 27.5″ Size: M, ML, L, XL
Bontrager Line Comp 30, High Strength 6000 Series Aluminium rim, Tubeless-Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12 mm thru axle, 29″ Skewer rear Bontrager Switch thru-axle, removable lever *Tyre Size: S
Bontrager Gunnison Pro XR, Tubeless-Ready, wire bead, 60 tpi, 27.5×2.40″ Size: M, ML, L, XL
Bontrager Gunnison Pro XR, Tubeless Ready, dual compound, aramid bead, 60 tpi, 29×2.40″ Tyre part Bontrager TLR sealant, 180 ml/6 oz Max tyre size Frame: 29×2.50″, Fork: See manufacturer

Shifter Shimano XT M8100, 12-speed Rear derailleur Shimano XT M8100, long cage Crank Shimano Deore M6120, 30T ring, 55 mm chainline, 170 mm length Bottom bracket Shimano BB-MT501 BSA Cassette Shimano SLX M7100, 10-51T, 12-speed Chain Shimano SLX M7100, 12-speed Max. chainring size 1x: 34T, min 30T

Saddle Bontrager Verse P3, chromoly rails *Seatpost Size: S
Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9 mm, 310mm length Size: M, ML, L, XL
Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 450 mm length Handlebar Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width Grips Bontrager XR Trail Comp, nylon lock-on Stem Bontrager Elite, 35 mm, 0-degree, 45 mm length Brake Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper Brake rotor Shimano RT66, 6-bolt, 180 mm Rotor size Max brake rotor sizes Frame: 200 mm, min 180 mm, Fork: see fork manufacturer

Bag Bontrager BITS Internal Frame Storage Bag

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 136 kg (300 lb).

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.