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For anyone who has ridden a conventional mountain bike for years, the Trek Fuel+ MX 9.8 XT is a gentle transition: compact 60 Nm TQ HPR60 motor, 580 Wh battery, OCLV Mountain carbon frame and mechanical Shimano XT drivetrain just like on a non-assisted bike. It runs 150 mm at the rear and 160 mm up front. Trek has not published a weight for this version: the 9.8 XT Di2, which shares the frame and motor, serves as a benchmark at 19.79 kg in size M. The Lichen Green/Keswick Green Splatter lays rich Keswick green splashes over a soft lichen green.
| 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 | Fox Factory 36 Float EVOL GRIP X2 160 mm / Fox Factory Float X 205 x 60 mm, 150 mm |
| Drivetrain | Mechanical Shimano XT 1x12, M8200 long-cage derailleur, XT M8200 10-51 cassette, XT M8100 chain |
| Brakes | Shimano XT M8220 4-piston hydraulic, Shimano 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 MaxxGrip Double Down (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 experienced mountain biker who does not want a heavy, noisy electric bike, but would like to fit more descents into a single ride or keep up with younger friends.
OCLV carbon, Trek's signature. OCLV is the name of Trek's carbon know-how: a moulding process in which pressure and temperature eliminate air trapped between the fibre plies, for a dense wall with no weak points. The Mountain branch of this carbon accepts a few extra grams in exchange for better resistance to rock strikes and crashes. The Fuel+ MX 9.8 XT uses it to create a frame that houses a 580 Wh TQ battery you remove for charging, with a very compact HPR60 motor, and that Trek covers with a lifetime warranty.
| Fuel+ (TQ HPR60) | Fuel EXe (TQ HPR50) | Rail+ (Bosch CX) | |
| Motor torque | 60 Nm (350 W peak) | 50 Nm | Bosch Performance Line CX |
| Battery | 580 Wh removable | 360 Wh | PowerTube 800 Wh |
| Reference weight (M) | 19.79 kg (MX 9.8 XT Di2) | 19.33 kg (EXe 9.7) | 23.73 kg (Rail+ 9.7) |
| What it means | Balance between lightness and range | Lighter, less range | More battery, noticeably heavier |
Put simply: the Fuel+ MX 9.8 XT keeps the essentials of the MX with electronic shifting, carbon frame, TQ motor and Fox Factory suspension, but goes back to a cable-operated Shimano XT derailleur. With no published weight for this version, the reference remains the 9.8 XT Di2, identical apart from the drivetrain: 19.79 kg in size M.
The HPR60 was designed to fade into the background: it runs quietly and its progressive assist feels like pedalling with better legs rather than being pushed. The motor delivers 250 W nominal and stops assisting at 25 km/h, in line with European regulations.
The Fox Factory 36 fork and its GRIP X2 damper separate the compression and rebound adjustments at high and low speed, much appreciated on the rock slabs and steps of the garrigue around Béziers. Paired with the Float X shock, it delivers the ride of the best trail bikes, with the added reserve of a motor for the climbs.
| Model | Motor / battery | Rear / front travel | Drivetrain | Weight (M) |
| Fuel+ EX 9.8 XT | TQ HPR60, 580 Wh | 145 / 150 mm | Mechanical Shimano XT | 20.10 kg |
| Fuel+ MX 9.8 XT | TQ HPR60, 580 Wh | 150 / 160 mm | Mechanical Shimano XT | 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 XT | TQ HPR60, 580 Wh | 160 / 170 mm | Mechanical Shimano XT | not disclosed |
Our take: compared with a non-assisted mountain bike, there is a weight difference, but the Fuel+ MX stays firmly in the lightweight e-MTB camp: 19.79 kg in M for the Di2 version, against 23.73 kg for a Rail+ 9.7 with an 800 Wh Bosch battery.
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LVR sizing advice Between two sizes, the smaller one makes the Fuel+ MX livelier through switchbacks, the larger one more composed as speed rises. The dropper post goes from 150 mm in S to 200 mm from L upwards, and all sizes run 29-inch up front and 27.5 at the rear.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| Can you hear the motor? | Very little: the HPR60 is appreciated for how discreet it is on the trail. |
| What happens above 25 km/h? | The assist cuts out and you pedal as on a conventional mountain bike. |
| How should the battery be stored in winter? | In a dry place, at room temperature and neither full nor empty; we teach you the right habits. |
| Is the lichen green flashy? | Fairly soft, it is brought to life by splashes of a deeper green. |
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The LVR Cycles verdict The ideal Fuel+ MX for moving from a conventional mountain bike to assist without losing the riding feel. Its lichen green speckled with Keswick green gives it a fresh, natural personality.
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Why buy from LVR Cycles? As a Trek dealer in Béziers, we help you make the move to an e-MTB: getting to grips with the TQ system, battery charging and storage advice, and Fox suspension setup.
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