2025 Top Fuel 9.9 X0 AXS Gen 4

The Top Fuel 9.9 X0 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 wireless X0 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.

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

Fork

RockShox Pike Ultimate, DebonAir spring, Charger 3.1 RC2 damper, 44 mm offset, Boost110, Maxle Stealth, 130 mm travel

Brakes

SRAM Level Silver 4-piston hydraulic disc

SRAM Level Silver Stealth 4-piston hydraulic disc

Shifters

SRAM AXS POD, paired with dropper

Front Derailleur

N/A

Rear Derailleur

SRAM X0 Eagle AXS, T-Type

Cassette

SRAM Eagle XS-1295, T-Type, 10-52, 12-speed

Crankset

SRAM X0 Eagle, DUB, 30T steel, T-Type, 55mm chainline, 170 mm length

Wheel Front

Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless-Ready, 6-bolt, Boost110, 15 mm thru-axle

Wheel Rear

Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12 mm thru-axle

Tyres

Bontrager Montrose RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi

Bontrager Gunnison RSL XT, Tubeless-Ready, triple compound, aramid bead, 120 tpi

Seatpost

RockShox Reverb AXS, 170 mm travel, wireless, 34.9 mm, 480 mm length

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