Carbon full-suspension electric mountain bike Trek Fuel+ LX 9.8 Eagle 90: TQ HPR60 580 Wh, 10-52, 160/170 mm

Trek Fuel+ LX 9.8 Eagle 90 Carbon Smoke: mechanics built to last

The Trek Fuel+ LX 9.8 Eagle 90 entrusts gear shifting to a mechanical SRAM Eagle 90 T-Type drivetrain, mounted directly on the UDH hanger, and braking to four-piston SRAM Maven Bronze brakes on 200 mm rotors. OCLV Mountain carbon frame, TQ HPR60, 580 Wh battery, RockShox 160 / 170 mm suspension: Trek has not published a weight for this version, with the Fox version serving as a benchmark at 20.88 kg in size M. Its Carbon Smoke/Lithium Grey Marble blends smoky grey with light grey marbling.

Technical specifications

Who is it for?

For the mountain biker who rides a lot, in all weathers, and prefers a cable-operated drivetrain they can adjust themselves at the side of the trail. It is also aimed at riders who often go on mountain bike trips, far from any workshop, and want tough parts that are easy to replace.

The LVR workshop view

OCLV carbon, Trek's signature. OCLV is Trek's in-house method: carbon layers pressed at high temperature to produce a dense laminate with no micro-voids. The Mountain version, reserved for mountain bikes, prioritises impact resistance over gram-shaving, a logical choice when the motor and battery add weight. This Fuel+ LX uses exactly the same frame as the Fox-equipped version, with adjustable head angle and progression, under the Trek lifetime warranty.

Put simply: this version replaces the Fox 38 and DHX2 shock with a RockShox ZEB Ultimate fork and Vivid Ultimate shock, without changing the 160 / 170 mm travel. Trek does not publish its weight; the Fox version, with the same frame and motor, serves as the benchmark at 20.88 kg in M.

The T-Type mount does away with the conventional derailleur hanger: the derailleur attaches to the wheel axle, making it far less vulnerable to rock strikes. The 10-52 cassette offers a very low gear which, combined with the assist, lets you clear the steepest ramps of the Montagne Noire seated without losing traction.

The four-piston Maven Bronze brakes work on 200 mm rotors front and rear: enough to keep their bite when the mass of an e-MTB adds to the gradient. The TQ assist, limited to 25 km/h and 250 W nominal by regulation, delivers its 60 Nm smoothly, making traction easy to manage on loose ground.

Which Fuel+ should you choose?

Our take: with its 10-52 range, the SRAM cassette has a bigger top sprocket than the Shimano 10-51 on the Fuel+ LX 9.8 XT. Both share the frame, motor and 160 / 170 mm travel; the real difference lies in the suspension, RockShox here, Fox Factory on the XT.

Your questions

Why buy from LVR Cycles? In Béziers, we bleed your Mavens, set up the Eagle 90 drivetrain and explain how to keep the TQ battery in good condition over the winter.

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