Carbon full-suspension electric mountain bike Trek Fuel+ LX 9.9 X0 AXS: TQ HPR60 580 Wh, wireless, 160/170 mm

Trek Fuel+ LX 9.9 X0 AXS Carbon Smoke: a clean, uncluttered cockpit

On the Trek Fuel+ LX 9.9 X0 AXS, the SRAM X0 Eagle AXS T-Type drivetrain shifts all twelve gears by radio, with no housing between the shifter and the derailleur. The OCLV Mountain carbon frame houses a TQ HPR60 and a 580 Wh battery, with a 170 mm ZEB Ultimate and a Vivid Ultimate offering 160 mm. Trek has not published a weight for this version; the Fuel+ LX 9.8 Eagle 90, with the same frame and drive system, serves as a benchmark at 20.88 kg in size M. The Carbon Smoke/Lithium Grey Marble mixes smoky grey with lithium grey veins.

Technical specifications

Who is it for?

For the mountain biker won over by electronics who wants a clean cockpit and a drivetrain that can be adjusted from an app. It will suit the meticulous rider who keeps track of the condition of their components and likes everything to work in exactly the same way ride after ride.

The LVR workshop view

OCLV carbon, Trek's signature. OCLV carbon is born from a hot compaction process that eliminates voids between the fibres: the sounder the laminate, the less material is needed for a given stiffness. The OCLV Mountain variant applies this principle to durability against the impacts typical of mountain biking. On the Fuel+ LX 9.9, this frame gets the most refined parts in the family, a wireless drivetrain, Maven Silver brakes and a carbon-railed saddle, and carries a Trek lifetime warranty.

Put simply: the 9.9 X0 AXS is the best-equipped Fuel+ LX: Line Pro 30 wheels, Maven Silver brakes, SRAM wireless drivetrain, Fox Transfer Neo dropper and carbon handlebar, built around RockShox Ultimate suspension. Trek does not give its weight; the 9.8 Eagle 90, with an identical frame and motor, serves as the benchmark at 20.88 kg in M.

The X0 T-Type derailleur mounts directly on the rear axle, with no intermediate hanger: it is stiffer and better protected from impacts against the boulders of the garrigue. Its 10-52 cassette offers a very low gear which, combined with the motor's help, lets you climb rough ramps seated without spinning out.

The wireless derailleur is charged just like the bike's battery: a habit to get into before every big ride. The TQ motor, compliant with the European e-bike rule with 250 W nominal and assist that stops at 25 km/h, stays discreet, so gear changes happen in almost complete silence.

Which Fuel+ should you choose?

Our take: the 9.9 X0 AXS is the only Fuel+ LX with a SRAM wireless drivetrain; the 9.8 XT Di2 offers Shimano wireless with a 10-51 cassette. Both share the frame and 160 / 170 mm travel, but the 9.9 adds Line Pro 30 wheels and a Fox Transfer Neo dropper.

Your questions

Why buy from LVR Cycles? As a Trek dealer in Béziers, we pair and update your AXS drivetrain, set up the RockShox suspension and look after TQ motor support.

Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.