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For long descents, the Trek Fuel+ MX 9.8 Eagle 90 relies on four-piston SRAM Maven Bronze brakes, 200 mm HS2 rotors and a 2.5-inch Maxxis Assegai MaxxGrip front tyre, on an OCLV Mountain carbon frame suspended by RockShox (170 mm up front, 150 mm at the rear). The TQ HPR60 motor and 580 Wh battery take care of the climb back up. Trek has not published a weight for this version; the 9.8 XT Di2, with an identical frame and motor, serves as a benchmark at 19.79 kg in size M. The Carbon Smoke/Lithium Grey Marble pairs a smoky anthracite grey with lithium grey marbling.
| Frame | OCLV Mountain carbon, removable battery, adjustable head angle and progression, ABP, UDH, Boost |
| Motor | TQ HPR60: 60 Nm, 250 W continuous, 350 W peak |
| Battery | TQ 580 Wh, removable |
| Controls / display | TQ colour LED display, Bluetooth and connectivity |
| Suspension | RockShox ZEB Ultimate Charger 3.2 RC2 with ButterCups 170 mm / RockShox Vivid Ultimate 205 x 65 mm, 150 mm |
| Drivetrain | Mechanical SRAM Eagle 90 T-Type 1x12, XS-1275 10-52 cassette, GX Eagle T-Type chain, SRAM XX 165 mm cranks |
| Brakes | SRAM Maven Bronze 4-piston hydraulic, SRAM HS2 200 mm rotors |
| Wheels / tyres | Bontrager Line Comp 30 aluminium, mixed-wheel setup / Maxxis Assegai 29 x 2.5 MaxxGrip EXO+ (front) and Minion DHR II 27.5 x 2.5 MaxxTerra EXO+ (rear), Tubeless Ready |
| Cockpit | Race Face Turbine alloy 35 mm handlebar, 40 mm rise, Bontrager Elite 45 mm stem |
| Saddle / seatpost | Verse Short Comp 145 mm / Bontrager Line Dropper 150 to 200 mm depending on size |
| Weight | Not published by Trek for this version; benchmark MX 9.8 XT Di2 (same frame, same motor): 19.79 kg in M |
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At a glance
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For the mountain biker who rides in the mountains and links big descents, where braking and grip matter more than a few grams. It is aimed at the rider who wants a confidence-inspiring bike on the slopes of the Caroux and the Espinouse, without moving to a heavy enduro e-MTB.
OCLV carbon, Trek's signature. With OCLV, Trek puts its fibres through a cycle of pressure and heat that leaves almost no porosity in the composite, a guarantee of long-term strength. Its Mountain version is designed for brutal use: hard impacts, flying stones and crashes. On the Fuel+ MX 9.8 Eagle 90, the gateway to the MX series, you get exactly the same carbon frame, its removable battery housing and the Trek lifetime warranty.
| Fuel+ (TQ HPR60) | Fuel EXe (TQ HPR50) | Rail+ (Bosch CX) | |
| Torque | 60 Nm | 50 Nm | Bosch Performance Line CX |
| Battery | 580 Wh, removable | 360 Wh | 800 Wh |
| Comparison weight (M) | 19.79 kg (MX 9.8 XT Di2) | 19.33 kg (EXe 9.7) | 23.73 kg (Rail+ 9.7) |
| What you gain | Lively bike, enough assist for all-mountain | Lightness, less reserve | Maximum reserve, more inertia |
Put simply: the 9.8 Eagle 90 spends its budget on RockShox Ultimate suspension, a 170 mm ZEB fork and Vivid shock, and keeps a mechanical SRAM drivetrain that is simple to maintain. To gauge its unpublished weight, refer to the Fuel+ MX 9.8 XT Di2 with an identical frame and motor: 19.79 kg in M.
The four-piston Maven Bronze brakes deliver high power that stays available on descents that go on and on. We check the bleed at the start of the season, as the summer heat around Béziers puts brake fluid to the test, and inspect pad wear at every service.
The front Assegai in MaxxGrip compound bites in the turns, while the rear Minion DHR II gets an EXO+ casing in MaxxTerra compound on this version, rolling faster on the link sections. The motor, like that of any European e-bike, stops assisting above 25 km/h and stays limited to 250 W nominal.
| Model | Motor / battery | Rear / front travel | Drivetrain | Weight (M) |
| Fuel+ EX 9.8 Eagle 90 | TQ HPR60, 580 Wh | 145 / 150 mm | SRAM Eagle 90 T-Type | 20.38 kg |
| Fuel+ MX 9.8 Eagle 90 | TQ HPR60, 580 Wh | 150 / 170 mm | SRAM Eagle 90 T-Type | not disclosed |
| Fuel+ MX 9.8 XT Di2 | TQ HPR60, 580 Wh | 150 / 160 mm | Wireless Shimano XT Di2 | 19.79 kg |
| Fuel+ LX 9.8 Eagle 90 | TQ HPR60, 580 Wh | 160 / 170 mm | SRAM Eagle 90 T-Type | 20.88 kg |
Our take: compared with the Fuel+ MX 9.8 XT and XT Di2, the 9.8 Eagle 90 moves to a 170 mm fork instead of 160 mm and to SRAM brakes instead of Shimano. The Fuel+ LX 9.8 Eagle 90 (160 / 170 mm, 20.88 kg in M) goes further towards enduro.
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LVR sizing advice On the cusp of two sizes, choose the smaller one if you like to place the bike and jump, the larger one if you mostly ride fast on steep ground. All sizes get the 27.5-inch rear wheel, and the Line Dropper grows from 150 to 200 mm with the frame.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| Are 200 mm rotors enough? | Yes for all-mountain; with four pistons, they hold up on long descents. |
| Why two different compounds? | MaxxGrip up front for grip, MaxxTerra at the rear for better rolling. |
| Tubeless out of the box? | The tyres are Tubeless Ready; we fit them without inner tubes, with sealant. |
| Is this grey timeless? | Yes, the marbled smoky grey ages well and goes with any kit. |
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The LVR Cycles verdict A Fuel+ MX designed for descending with confidence, with powerful Maven braking and well-chosen Maxxis tyres. The smoky grey marbled with lithium grey dresses this carbon frame in understated style.
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Why buy from LVR Cycles? In Béziers, we bleed your Maven brakes, fit your tyres tubeless and set up the suspension of your Fuel+ MX for your descents.
Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.
Data sheet
Specific References