Trek Top Fuel 9.8 GX AXS T-Type Gen 4 2025

Home / Trek Top Fuel 9.8 GX AXS T-Type Gen 4 2025

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Top Fuel 9.8 GX AXS Gen 4 is a lightweight carbon trail bike built to rip up climbs and stay playful on descents. It gives you the confidence you want through roots and rocks, thanks to a 120mm/130mm RockShox suspension package with a Pike Select+ fork and Deluxe Ultimate shock. Plus, you can shift easy even under load with a SRAM GX Eagle AXS wireless transmission.

Frame

OCLV Mountain Carbon, internal storage, tapered head tube, Knock Block 2.0, internal guided routing, downtube guard, magnesium rocker link, Mino Link, ABP, Boost148, 120mm travel

Fork

RockShox Pike Select+, DebonAir spring, Charger 3 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel

Shock

RockShox Deluxe Ultimate RCT, 185mm x 50mm

Max compatible fork travel

Frame	OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, alloy rocker link, 4-way Mino Link, ABP, Boost148, 120mm travel
Fork	RockShox Pike Select+, DebonAir spring, Charger 3.1 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 130mm travel
Shock	RockShox Deluxe Ultimate RCT, 185mm x 50mm
Max compatible fork travel	140mm

Wheels

*Wheel front	Size: S Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 27.5''
*Wheel front	Size: M, ML, L, XL Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle, 29''
*Wheel rear	Size: S Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 27.5''
*Wheel rear	Size: M, ML, L, XL Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle, 29''
Skewer rear	Bontrager Switch thru axle, removable lever
*Tire	Size: S Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 27.5x2.40''
	Size: M, ML, L, XL Bontrager Montrose RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
	Size: M, ML, L, XL Bontrager Gunnison RSL XT, Tubeless Ready, triple compound, aramid bead, 120 tpi, 29x2.40''
Tire part	Bontrager TLR sealant, 180 ml/6 oz
Rim strip	Bontrager TLR
Max tire size	Frame: 29x2.50", Fork: See manufacturer

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, 55mm chainline, 170mm length
Bottom bracket	SRAM DUB MTB Wide, 73mm, BSA threaded
Cassette	SRAM Eagle XS-1275, T-Type, 10-52, 12 speed
Chain	SRAM GX Eagle, T-Type, 12 speed
Max chainring size	1x: 34T, min 30T

Components

Saddle	Verse Short Comp, steel rails, 145mm width
*Seatpost	Size: S Bontrager Line Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 310mm length
*Seatpost	Size: M, ML, L, XL Bontrager Line Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 4500mm length
*Handlebar/stem (integrated)	Size: S Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 35mm stem length
*Handlebar/stem (integrated)	Size: M, ML, L, XL Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5mm handlebar rise, 820mm width, 0 degree stem rise, 45mm stem length
Grips	Bontrager XR Trail Elite, nylon lock-on
Brake	SRAM Level Bronze 4-piston hydraulic disc
Brake rotor	SRAM CenterLine, 6-bolt, round edge, 180mm
Rotor size	Max brake rotor sizes - Frame: 200mm, min 180mm, Fork: see fork manufacturer

Weight

Weight	M - 13.20 kg / 29.11 lbs (with TLR sealant, no tubes)
Weight limit	This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

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