Trek Top Fuel 8 2026
2026 Mountain
Estimate price |
4,071$
Weight | 14.58 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Travel Front 130mm -
Travel Rear 120mm -
Fork Fox Rhythm Float 34
-
Groupset XT, Deore -
Suspension Full -
Drivetrain 1 × 12 -
Brakes Shimano Deore Hydraulic Disc
Sizing
Recommended size guide.
MD High
165cm - 176cm
MD Low
165cm - 176cm
MD/LG High
173cm - 180cm
MD/LG Low
173cm - 180cm
LG High
177cm - 189cm
LG Low
177cm - 189cm
XL High
187cm - 195cm
XL Low
187cm - 195cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
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
Suspension Fork
Fox Rhythm 34, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 130mm travel
Rear Shock
Fox Performance Float DPS, 2-position damper, 185mm x 50mm
Drivetrain
Rear Derailleur
Shimano XT M8100, long cage
Shift Levers
Shimano XT M8100, 12 speed
Cassette
Shimano SLX M7100, 10-51T, 12 speed
Crank
Shimano Deore M6120, 30T ring, 55mm chainline, 170mm length
Bottom Bracket
Shimano BB-MT501 BSA
Chain
Shimano SLX M7100, 12 speed
Wheels
Rims
Front: Size: S, Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5''; Size: M, ML, L, XL, Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29'', Rear: Size: S, Bontrager Line Comp 30, High Strength 6000 Series Aluminum rim, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 27.5''; Size: M, ML, L, XL, Bontrager Line Comp 30, High Strength 6000 Series Aluminum rim, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12mm thru axle, 29''
Tires
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''
Brakes
Brakes
Shimano 4-piston hydraulic disc, M6100 lever, M6120 caliper
Cockpit
Stem
Bontrager Elite, 35mm, 0 degree, 45mm length
Handlebar
Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
Grips
Bontrager XR Trail Comp, nylon lock-on
Seat
Saddle
Bontrager Verse P3, chromoly rails
Seatpost
Size: S, Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 310mm length; Size: M, ML, L, XL, Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 450mm length
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | MD High | MD Low | MD/LG High | MD/LG Low | LG High | LG Low | XL High | XL Low |
|---|---|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.325 mm | 1.349 mm | 1.293 mm | 1.314 mm | 1.261 mm | 1.283 mm | 1.223 mm | 1.243 mm |
| Bottom Bracket Height | 348 mm | 342 mm | 348 mm | 342 mm | 348 mm | 342 mm | 348 mm | 342 mm |
| Front Center | 755 mm | 755 mm | 772 mm | 772 mm | 789 mm | 789 mm | 827 mm | 828 mm |
| Rake | 42 mm | 43 mm | 42 mm | 43 mm | 42 mm | 43 mm | 42 mm | 43 mm |
| Trail | 121 mm | 125 mm | 121 mm | 125 mm | 121 mm | 125 mm | 121 mm | 125 mm |
| Stack | 599 mm | 603 mm | 604 mm | 607 mm | 608 mm | 612 mm | 626 mm | 630 mm |
| Reach | 452 mm | 447 mm | 467 mm | 462 mm | 482 mm | 477 mm | 512 mm | 507 mm |
| Top Tube Length | 587 mm | 588 mm | 611 mm | 612 mm | 630 mm | 631 mm | 672 mm | 673 mm |
| Seat Tube Angle | 77.3 ° | 76.9 ° | 76.6 ° | 76.2 ° | 76.3 ° | 75.9 ° | 75.6 ° | 75.2 ° |
| Seat Tube Length | 410 mm | 410 mm | 420 mm | 420 mm | 435 mm | 435 mm | 470 mm | 470 mm |
| Head Tube Angle | 65.9 ° | 65.5 ° | 65.9 ° | 65.5 ° | 65.9 ° | 65.5 ° | 65.9 ° | 65.5 ° |
| Head Tube Length | 105 mm | 105 mm | 110 mm | 110 mm | 115 mm | 115 mm | 135 mm | 135 mm |
| Chainstay Length | 434 mm | 435 mm | 439 mm | 440 mm | 439 mm | 440 mm | 444 mm | 445 mm |
| Wheelbase | 1188 mm | 1188 mm | 1210 mm | 1210 mm | 1227 mm | 1227 mm | 1270 mm | 1271 mm |
| Bottom Bracket Drop | 26 mm | 32 mm | 26 mm | 32 mm | 26 mm | 32 mm | 26 mm | 32 mm |
| Standover Height | 755 mm | 750 mm | 755 mm | 750 mm | 760 mm | 755 mm | 765 mm | 760 mm |
| Wheels | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" |
| Rider Min Height | 165 cm | 165 cm | 173 cm | 173 cm | 177 cm | 177 cm | 187 cm | 187 cm |
| Rider Max Height | 176 cm | 176 cm | 180 cm | 180 cm | 189 cm | 189 cm | 195 cm | 195 cm |