The Trek Top Fuel 9 Gen 4 is an alloy trail bike that's ready to billy-goat up long climbs and rip back to the bottom for another lap. It gives you the rugged benefits of a lightweight aluminium frame, plus the upgrades you crave, like fully wireless shifting from SRAM's GX Eagle AXS transmission, 4-piston hydraulic brakes and a 120 mm/130 mm FOX suspension package.
Sunset Cycles offers the 2025 Trek Top Fuel 9 Gen 4 trail bike in Juniper finish with free delivery.
The 2025 Trek TOP FUEL (ALLOY) range: Top Fuel 5 Gen 4 (Mercury) | Top Fuel 8 Gen 4 (Black) | Top Fuel 9 Gen 4 (Juniper)
| Frame & Fork | |
| Frame | Alpha Platinum Aluminium, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 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 |
| Wheels & Tyres | |
| 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, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 27.5'' Size: M, ML, L, XL Bontrager Line Comp 30, Tubeless-Ready, Rapid Drive 54, 6-bolt, Boost148, 12 mm thru axle |
| Tyre | 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" |
| E-system | |
| Battery | SRAM eTap battery pack (with charger) |
| Drivetrain | |
| Shifter | SRAM AXS POD |
| Rear derailleur | SRAM GX Eagle AXS, T-Type |
| Crank | SRAM GX Eagle, T-Type, DUB, 30T, 55 mm chain line, 170 mm length |
| Bottom bracket | SRAM DUB MTB Wide, 73 m, BSA threaded |
| Cassette | SRAM Eagle XS-1275, T-Type, 10-52, 12-speed |
| Chain | SRAM GX Eagle, T-Type, 12-speed |
| Components | |
| Saddle | Verse Short Comp, steel rails, 145 mm width |
| 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 | SRAM Level Bronze 4-piston hydraulic disc |
| Brake rotor | SRAM CentreLine, 6-bolt, round-edge, 180 mm |
| Rotor size | Max brake rotor sizes – Frame: 200 mm, min 180 mm, Fork: see fork manufacturer |
| Accessories | |
| Bag | Bontrager BITS Internal Frame Storage Bag |
| Weight | |
| Weight | M - 14.38 kg / 31.71 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). |
| Frame Size | Rider Height* (metric) | Rider Height* (imperial) |
| Small | 155 - 165 cm | 5'1" - 5'5" |
| Medium | 165 - 176 cm | 5'5" - 5'9" |
| Medium/Large | 173 - 180 cm | 5'8" - 5'11" |
| Large | 177 - 188 cm | 5'10" - 6'2" |
| X Large | 188 - 195 cm | 6'2" - 6'5" |
| *This is for guidance only. You may be taller or shorter, it doesn't mean our bikes will not fit you. The best way to determine the correct bike size for you is to try one. Please contact us if you are in any doubt about the correct bike size for you. | ||