Trek Top Fuel Alloy (Gen 3)
Frame

Specifications
- Manufacturer
- Trek
- Name
- Top Fuel Alloy (Gen 3)
- Discipline
- Mountain
- Material
- Aluminum
- Head Tube
- Tapered
- Max Fork Travel (mm)
- 120
- Seatpost Diameter (mm)
- 31.6
- Wheel Sizes
- 700c / 29"
- Frame Size
- S, M, M/L, L, XL, XXL
- Front Axle Standard
- 15 × 110 mm (Boost)
- Rear Axle Standard
- 12 × 148 mm (Boost)
- BB Standard
- BB92 PRESSFIT
- Cable Routing
- Internal
- Max Chainring Size (T)
- 36
Included Components
forkTrek Top Fuel Alloy (Gen 3) Fork
| Image | Component | Part | Quantity |
|---|---|---|---|
![]() | fork | Trek Top Fuel Alloy (Gen 3) Fork | 1 |
Compatibility
Trek Top Fuel Alloy (Gen 3) is a Trek mtb frame. Everything listed below was matched on a specification we hold for both parts: the interface each pairing actually depends on, such as freehub body, speed count, actuation or mounting standard. Where we could not verify that interface, the part is left out rather than assumed to fit.
Bottom brackets for this frame shell8
Mechanically compatibleFSA
BB392 crank to press fit BB89.5/92mm frame
- Both are bb92 pressfit bottom bracket shells
Mechanically compatibleShimano
DEORE XT PRESS-FIT BOTTOM BRACKET 89.5/92 MM SHELL WIDTH
- Both are bb92 pressfit bottom bracket shells
Mechanically compatibleFSA
MegaExo MTB crank to press fit BB92 frame (24mm)
- Both are bb92 pressfit bottom bracket shells
Mechanically compatibleFSA
MegaExo MTB crank to press fit BB92 frame with ceramic bearings
- Both are bb92 pressfit bottom bracket shells
Mechanically compatibleShimano
PRESS-FIT BOTTOM BRACKET 89.5/92 MM
- Both are bb92 pressfit bottom bracket shells
Mechanically compatibleShimano
SAINT PRESS-FIT BOTTOM BRACKET 104.5/107 MM SHELL WIDTH
- Both are bb92 pressfit bottom bracket shells
Mechanically compatibleShimano
SAINT PRESS-FIT BOTTOM BRACKET 89.5/92 MM SHELL WIDTH
- Both are bb92 pressfit bottom bracket shells
Mechanically compatibleShimano
XTR PRESS-FIT BOTTOM BRACKET 89.5/92 MM SHELL WIDTH
- Both are bb92 pressfit bottom bracket shells
Seatposts for this seat tube20
Mechanically compatibleFSA
AFTERBURNER seatpost
- Both are 31.6mm
Mechanically compatibleBrand-X
Ascend Dropper Seatpost
- Both are 31.6mm
Mechanically compatibleBrand-X
Ascend II Dropper Seatpost
- Both are 31.6mm
Mechanically compatibleBrand-X
Ascend XL Dropper Seatpost
- Both are 31.6mm
Mechanically compatiblePNW Components
Cascade Dropper Post
- Both are 31.6mm
Mechanically compatiblePNW Components
Coast Suspension Dropper Post
- Both are 31.6mm
Mechanically compatibleDeda Elementi
Cross 25mm Seatpost
- Both are 31.6mm
Mechanically compatibleBikeYoke
Divine 2.0
- Both are 31.6mm
Mechanically compatibleBikeYoke
Divine SL
- Both are 31.6mm
Mechanically compatibleBikeYoke
Divine SL Rascal
- Both are 31.6mm
Mechanically compatibleSyncros
Duncan 2.0 Seatpost 0mm Offset
- Both are 31.6mm
Mechanically compatibleSyncros
Duncan 2.0 Seatpost 15mm Offset
- Both are 31.6mm
Mechanically compatibleSyncros
Duncan SL Seatpost 10mm Offset
- Both are 31.6mm
Mechanically compatibleSyncros
Duncan SL Seatpost 25mm Offset
- Both are 31.6mm
Mechanically compatibleEaston
EA50 Seatpost
- Both are 31.6mm
Mechanically compatibleCane Creek
eeSilk+ Alloy
- Both are 31.6mm
Mechanically compatibleCane Creek
eeSilk+ Carbon
- Both are 31.6mm
Mechanically compatibleThomson
Elite Seatpost 31.6mm x 367mm
- Both are 31.6mm
Mechanically compatibleThomson
Elite Seatpost 31.6mm x 410mm
- Both are 31.6mm
Mechanically compatibleThomson
Elite Setback Seatpost 31.6mm x 367mm
- Both are 31.6mm
Forks with a matching steerer and wheel size20
Mechanically compatibleLightCarbon
29er Full Carbon Rigid Mtb Plus Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleLightCarbon
700C Disc Brake CX Fork Gravel Carbon Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleLightCarbon
700C Disc Brake Gravel Carbon Fork Aero Gravel Bike Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleLightCarbon
700C Disc Brake Gravel Carbon Fork Racing Gravel Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleDeda Elementi
Allroad Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleSalsa
Cutthroat Carbon Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleSalsa
Firestarter Carbon Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Lauf
Grit
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Lauf
Grit SL
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleColumbus
Pista Leggera
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleENVE
Road In-Route Fork 43mm
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleENVE
Road In-Route Fork 50mm
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Lauf
TR Boost 29
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleSalsa
Waxwing Carbon Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleFox
32 FACTORY TC - GRIP SL
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleFox
32 PERFORMANCE TAPER-CAST - GRIP
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleWhisky Parts Co
Carbon Gravel Fork No.9 MCX+
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleKinesis
Crosslight CC Disc Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleKinesis
Crosslight CX Disc Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Mechanically compatibleKinesis
CXD Fork
- Both use a tapered 1-1/8" to 1.5" steerer
- Both are built for 700c wheels
Frequently Asked Questions
What fits Trek Top Fuel Alloy (Gen 3)?
On this page we list bottom brackets for this frame shell, seatposts for this seat tube, forks with a matching steerer and wheel size. Each listing was matched on a specification we hold for both parts; anything we could not verify is omitted rather than assumed to fit.
Can I mix Trek Top Fuel Alloy (Gen 3) with road components?
Trek Top Fuel Alloy (Gen 3) is recorded as a mtb component. Some standards do carry across (cassette spacing at a given speed count, for instance), but cable pull ratio and chainline frequently differ between mtb and road groups, so check the specific pairing rather than assuming it carries over.