Name: Trek Top Fuel 9.9 XX AXS Gen 4 2025
Brand: Trek
SKU: 5319423
Price: 10000.0 GBP
Availability: InStock

£10,000.00

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The Top Fuel 9.9 XX AXS Gen 4 is an ultra-light and capable carbon trail bike that's built for soaring up climbs and rallying over miles of singletrack. This top-level build delivers the performance you want, with a RockShox Ultimate suspension package (120 mm/130 mm) and SRAM's lightest wireless XX AXS transmission that shifts smooth and easy, especially under load. It's topped off with carbon wheels to keep your ride light from top to bottom.

You want the best carbon trail bike with all-mountain capability, climbing efficiency and components to match. You don't mind spending a little extra to get the ultra-lightweight benefits of SRAM's XX AXS wireless transmission and an upgraded RockShox Ultimate suspension package is a must.

An OCLV Mountain Carbon frame with a 4-way Mino Link lower shock mount for tweaking geometry and suspension leverage rate. A 130 mm RockShox Pike Ultimate fork with DebonAir spring, and Charger 3.1 RC2 damper, plus 120 mm of rear travel from a RockShox Deluxe Ultimate RCT shock. An ultra-light wireless SRAM XX AXS transmission, SRAM Level Ultimate 4-piston hydraulic brakes, RockShox Reverb AXS dropper post and tubeless-ready Bontrager Line Pro 30 carbon wheels.

When you're after the best all-mountain carbon ride, reach for the Top Fuel 9.9 XX AXS Gen 4. With an ultra-light frame, carbon wheels and SRAM XX wireless transmission, it delivers everything you want on dirt. Plus, it's built with a 4-way Mino Link lower suspension mount for taking control of your geometry and suspension feel.

Specifications

Frame	OCLV Mountain Carbon, internal storage, tapered head tube, internal guided routing, downtube guard, OCLV Next rocker link, Mino 4 link, ABP, Boost148, 120 mm travel
Shock	RockShox Deluxe Ultimate RCT, 185 mm x 50 mm
Max compatible fork travel	140 mm

Wheels

*Wheel front	Size: S Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15 mm thru-axle, 27.5"
*Wheel front	Size: M, ML, L, XL Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15 mm thru-axle, 29"
Wheel rear	Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless-Ready, Rapid Drive 108, 6-bolt, Boost148, 12 mm thru axle
Skewer rear	Bontrager Switch thru-axle, removable lever
*Tyre	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"
Tyre part	Bontrager TLR sealant, 180 ml/6 oz
Rim strip	Bontrager TLR
Max tyre size	Frame: 29x2.50", Fork: See manufacturer

E-system

Battery	SRAM eTap battery pack (with charger)

Drivetrain

Rear derailleur	SRAM XX SL Eagle AXS, T-Type
Crank	SRAM XX Eagle, DUB, 30T, T-Type, 55 mm chainline, 170 mm length
Bottom bracket	SRAM DUB MTB Wide, 73 m, BSA threaded
Cassette	SRAM Eagle XS-1299, T-Type, 10-52, 12-speed
Chain	SRAM XX Eagle, T-Type, 12-speed
Max. chainring size	1x: 34T, min 30T

Components

Saddle	Verse Short Pro, carbon rails, 145 mm width
*Seatpost	Size: S RockShox Reverb AXS, 100 mm travel, wireless, 34.9 mm, 340 mm length
*Seatpost	Size: M, ML, L, XL RockShox Reverb AXS, 170 mm travel, wireless, 34.9 mm, 480 mm length
*Handlebar/stem (integrated)	Size: S Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5 mm handlebar rise, 820 mm width, 0-degree stem rise, 35 mm stem length
*Handlebar/stem (integrated)	Size: M, ML, L, XL Bontrager RSL Integrated handlebar/stem, OCLV Carbon, 27.5 mm handlebar rise, 820 mm width, 0-degree stem rise, 45mm stem length
Brake	SRAM Level Ultimate 4-piston hydraulic disc
Brake rotor	SRAM HS2, 6-bolt, 180mm
Rotor size	Max brake rotor sizes – Frame: 200 mm, min 180 mm, Fork: see fork manufacturer

Weight

Weight	M - 12.85 kg / 28.33 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).

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.

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