Trek Fuel EX 8 XT Gen 6 2025

Bike details

Overview

Key information split into simple groups.

Bike summary

Category
- Mountain
- |
- Trail
Frame Aluminum
Travel Front 150mm
Travel Rear 140mm
Fork Fox Rhythm Float 36
Groupset XT, Deore
Suspension Full
Drivetrain 1 × 12
Brakes Hydraulic Disc

Sizing

Recommended size guide.

SM High
155cm - 166cm
SM Low
155cm - 166cm
MD High
164cm - 176cm
MD Low
164cm - 176cm
MD/LG High
173cm - 180cm
MD/LG Low
173cm - 180cm
LG High
177cm - 189cm
LG Low
177cm - 189cm
XL High
187cm - 196cm
XL Low
187cm - 196cm
XXL High
194cm - 203cm
XXL Low
194cm - 203cm

Parts list

Components

Main components, grouped by system.

Bike components

Frame

Alpha Platinum Aluminium, internal storage, angle-adjust headset, Mino Link adjustable geometry, adjustable leverage rate, guided internal routing, magnesium rocker link, 34.9 mm seat tube, ISCG 05, 55 mm chain line, BSA 73, downtube guard, shuttle guard, ABP, UDH, Boost148, 140 mm travel

Suspension Fork

Size: XS, S, Fox Rhythm 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 140 mm travel; Size: M, ML, L, XL, XXL, Fox Rhythm 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 150 mm travel

Rear Shock

Fox Performance Float X, 2-position damper, 185 mm x 55 mm

Drivetrain

Rear Derailleur

Shimano XT M8100, long cage

Shift Levers

Shimano XT M8100, 12-speed

Cassette

Shimano XT M8100, 10-51, 12-speed

Crank

Shimano Deore M6120, 30T ring, 55 mm chainline, 170 mm length

Bottom Bracket

Shimano BB-MT501 BSA

Chain

Shimano SLX M7100, 12-speed

Wheels

Rims

Front: Size: XS, S, Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 27.5"; Size: M, ML, L, XL, XXL, Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29", Rear: Size: XS, S, Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12 mm thru axle, 27.5"; Size: M, ML, L, XL, XXL, Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12 mm thru axle, 29"

Tires

Size: XS, S, Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 60 tpi, 27.5 x 2.50"; Size: XS, S, Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 60 tpi, 27.5x2.50"; Size: M, ML, L, XL, XXL, Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 60 tpi, 29x2.50"

Brakes

Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper

Cockpit

Stem

Size: XS, S, Bontrager Elite, 35 mm, 0-degree, 35 mm length; Size: M, ML, L, XL, XXL, Bontrager Elite, 35 mm, 0-degree, 45 mm length

Handlebar

Size: XS, S, Bontrager Line, alloy, 35 mm, 27.5 mm rise, 750 mm width; Size: M, ML, L, XL, XXL, Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width

Grips

Bontrager XR Trail Elite, nylon lock-on

Seat

Saddle

Size: XS, S, M, ML, L, XL, XXL, Bontrager Verse P3, chromoly rails; Size: XS, S, M, ML, L, XL, XXL, Bontrager Arvada, hollow chromoly rails, 138 mm width

Seatpost

Size: XS, S, TranzX JD-YSP39, 100 mm travel, internal routing, 34.9 mm; Size: XS, S, Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9 mm, 310mm length; Size: M, ML, TranzX JD-YSP39, 150 mm travel, internal routing, 34.9 mm; Size: M, ML, Bontrager Line Dropper, 150mm travel, MaxFlow, internal routing, 34.9 mm, 410 mm length; Size: L, XL, XXL, TranzX JD-YSP39, 170 mm travel, internal routing, 34.9 mm; Size: L, XL, XXL, Bontrager Line Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 450 mm length

Fit data

Geometry

Numbers for sizing and ride feel.

Size	SM High	SM Low	MD High	MD Low	MD/LG High	MD/LG Low	LG High	LG Low	XL High	XL Low	XXL High	XXL Low
Stack Reach Ratio	1.321 mm	1.335 mm	1.342 mm	1.371 mm	1.286 mm	1.313 mm	1.257 mm	1.28 mm	1.209 mm	1.233 mm	1.169 mm	1.189 mm
Bottom Bracket Height	337 mm	332 mm	343 mm	335 mm	343 mm	335 mm	343 mm	335 mm	343 mm	335 mm	343 mm	335 mm
Front Center	741 mm	741 mm	781 mm	781 mm	796 mm	796 mm	813 mm	813 mm	845 mm	844 mm	876 mm	875 mm
Rake	44 mm	44 mm	49 mm	48 mm	45 mm	44 mm	45 mm	44 mm	39 mm	40 mm	34 mm	35 mm
Trail	119 mm	122 mm	125 mm	129 mm	125 mm	129 mm	125 mm	129 mm	125 mm	129 mm	125 mm	129 mm
Stack	572 mm	574 mm	612 mm	617 mm	612 mm	617 mm	617 mm	621 mm	630 mm	635 mm	644 mm	648 mm
Reach	433 mm	430 mm	456 mm	450 mm	476 mm	470 mm	491 mm	485 mm	521 mm	515 mm	551 mm	545 mm
Top Tube Length	550 mm	551 mm	583 mm	584 mm	606 mm	607 mm	626 mm	627 mm	660 mm	662 mm	695 mm	697 mm
Seat Tube Angle	78.5 °	78.2 °	78.8 °	78.2 °	78 °	77.5 °	77.7 °	77.2 °	77.1 °	76.6 °	76.5 °	76 °
Seat Tube Length	380 mm	380 mm	410 mm	410 mm	420 mm	420 mm	435 mm	435 mm	470 mm	470 mm	500 mm	500 mm
Head Tube Angle	64.8 °	64.5 °	65.1 °	64.5 °	65.1 °	64.5 °	65.1 °	64.5 °	65 °	64.5 °	65 °	64.5 °
Head Tube Length	95 mm	95 mm	100 mm	100 mm	100 mm	100 mm	105 mm	105 mm	120 mm	120 mm	135 mm	135 mm
Chainstay Length	434 mm	435 mm	433 mm	435 mm	438 mm	440 mm	438 mm	440 mm	443 mm	445 mm	448 mm	450 mm
Wheelbase	1174 mm	1175 mm	1212 mm	1213 mm	1232 mm	1233 mm	1249 mm	1250 mm	1286 mm	1287 mm	1322 mm	1323 mm
Bottom Bracket Drop	21 mm	25 mm	31 mm	38 mm	31 mm	38 mm	31 mm	38 mm	30 mm	38 mm	30 mm	38 mm
Standover Height	727 mm	724 mm	743 mm	737 mm	748 mm	742 mm	754 mm	748 mm	774 mm	767 mm	781 mm	774 mm
Wheels	27"	27"	29"	29"	29"	29"	29"	29"	29"	29"	29"	29"
Rider Min Height	155 cm	155 cm	164 cm	164 cm	173 cm	173 cm	177 cm	177 cm	187 cm	187 cm	194 cm	194 cm
Rider Max Height	166 cm	166 cm	176 cm	176 cm	180 cm	180 cm	189 cm	189 cm	196 cm	196 cm	203 cm	203 cm

Model years

Trek Fuel EX 8 XT Gen 6 2025

Key information split into simple groups.

Bike summary

Recommended size guide.

Main components, grouped by system.

Bike components

Frame

Frame

Suspension Fork

Rear Shock

Drivetrain

Rear Derailleur

Shift Levers

Cassette

Crank

Bottom Bracket

Chain

Wheels

Rims

Tires

Brakes

Brakes

Cockpit

Stem

Handlebar

Grips

Seat

Saddle

Seatpost

Numbers for sizing and ride feel.

Related bike families.