Trek Fuel+ MX 9.8. Light assist. Light years ahead.
More laps. Bigger rides. Same versatile trail feel. The Trek Fuel + MX 9.8 is a mid-assist e-MTB that brings power to the pedal without sacrificing the soul of the ride. With three build options and ultra-adjustable geometry, it’s easy to fine-tune your set-up for tech, flowy loam or the deepest steeps. Just choose your adventure and ride without limits.
Engineered Chassis
The Fuel + MX 9.8 sets a new benchmark for riders who demand uncompromising performance from their enduro e-MTB. Built around a lightweight yet robust full-suspension chassis, it strikes the perfect balance of precision handling, climbing efficiency and downhill capability.
TQ HPR60 Power with 580 Wh Range
At the core of this e-MTB is the TQ HPR60 drive system, delivering a perfectly balanced 60 Nm of torque with smooth, natural-feeling assistance that kicks in the moment the gradient steepens. Paired with a 580 Wh battery, it provides the range to take on long rides and big days in the mountains. Both motor and battery sit low in the frame, creating a stable centre of gravity that keeps the bike agile in corners and composed through technical rock gardens. The result is assistance that enhances your pedalling without ever overpowering it — an authentic mountain bike experience, just amplified for bigger climbs and bolder lines.
Design That Delivers
The aesthetic is just as refined as the ride. Clean cable routing, low-profile battery housing and a sleek integration of electronics give the Fuel + MX 9.8 a purposeful, premium look that matches its performance. This isn’t an e-bike that hides behind its motor — it’s one that embraces technology while keeping the focus firmly on the ride.
Geometry

Frame size number | 15.5" | 17.5" | 19.5" | 21.5" | 23" |
---|---|---|---|---|---|
Frame size letter | S | M | L | XL | XXL |
Wheel size | 29"/27.5" | 29" | 29" | 29" | 29" |
A — Seat tube | 37.0 | 40.0 | 42.0 | 45.5 | 47.5 |
B — Seat tube angle | 72.7° | 72.6° | 72.6° | 72.6° | 72.6° |
Effective seat tube angle | 78.2° | 77.8° | 77.3° | 76.9° | 76.4° |
C — Head tube length | 11.0 | 11.0 | 12.5 | 14.0 | 15.5 |
D — Head angle | 64.6° | 64.5° | 64.5° | 64.5° | 64.5° |
E — Effective top tube | 55.9 | 58.9 | 61.9 | 65.1 | 68.0 |
F — Bottom bracket height | 33.9 | 33.9 | 33.9 | 33.9 | 33.9 |
G — Bottom bracket drop | 3.4 | 3.5 | 3.5 | 3.5 | 3.5 |
H — Chainstay length | 44.1 | 44.4 | 44.4 | 44.7 | 45.2 |
I — Offset | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 |
J — Trail | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 |
K — Wheelbase | 120.0 | 123.2 | 125.8 | 129.8 | 133.0 |
L — Standover | 75.4 | 74.7 | 75.0 | 75.5 | 76.4 |
M — Frame reach | 43.1 | 46.0 | 48.5 | 51.0 | 53.0 |
N — Frame stack | 62.4 | 62.4 | 63.8 | 65.1 | 66.5 |
FAQs: Trek Fuel+ MX 9.8
Basics
What size bike do I need?
What is Frame Protection and is it worth fitting it to the Fuel+?
What is tubeless setup and can the Fuel+ be set up tubeless?
What equipment & info will the bike arrive with?
Is it possible to see the Fuel+ in your showroom & is it possible to have a test ride or demo it?
What type of bike is the Fuel+ and what is it designed for?
What type of terrain is the Fuel+ ideally suited towards?
Can the Trek Fuel+ MX 9.8 get wet and muddy?
How should you clean & maintain the Trek Fuel+ MX 9.8?
Can you tell me about the Trek brand?
I'm new to riding, what essential bits of kit do I need to get going?
Where can I ride the Trek Fuel+ MX 9.8?
Technical
Where can I find all of the major components that come on the bike?
Can you fit a water bottle on the Trek Fuel+ MX 9.8?
What warranty comes on the Trek Fuel+ MX 9.8?
Does the Trek Fuel+ MX 9.8 come with pedals?
Can I get hold of spare / replacement parts easily for the Trek Fuel+ MX 9.8?
Are electric bikes legal? How fast can the Trek Fuel+ MX 9.8 go?
Do I need a license to ride the Trek Fuel+ MX 9.8 in the UK?
Can I add upgrades to the bike?
Electric / Battery
How should I store the bike?
What is the battery lifespan on a Trek Fuel+ MX 9.8?
Are Lithium-Ion batteries safe?
Is the internal battery removable on the Trek Fuel+ MX 9.8?
What is the expected range of the battery on the Trek Fuel+ MX 9.8?
What is a range extender and can you add one to the Trek Fuel+ MX 9.8?
Does the bike arrive fully charged and ready to go?
How to charge the battery on the Trek Fuel+ MX 9.8?
How long does it take to charge the battery?
How is the motor protected ?
Purchasing
Why choose MTB Monster?
Do you offer 0% finance for the Trek Fuel+ MX 9.8?
Do you accept Cycle To Work vouchers? How does it work?
I'm still sorting my payment method, can I reserve a bike?
The bike is not yet in stock, can I pre-order one?
How will the bike be delivered & what are the setup requirements?
What are the delivery options?
Can I collect the bike in the store?
I still have more questions, can I speak to someone?
- FRAME:
- OCLV Mountain Carbon, removable battery, angle-adjust headset, adjustable leverage rate, guided internal routing, interchangeable alloy rocker links, interchangeable lower shock mount, downtube guard, shuttle guard, ABP, UDH, Boost148, adaptable trav
- FRAME MATERIAL:
- Carbon
- FORK BRAND:
- Fox
- FORK:
- Fox Factory 36, Float EVOL air spring, GRIP X2 damper, 44 mm offset, Boost 110, 15 mm Kabolt X axle, 160 mm travel
- FORK TRAVEL:
- 160 mm
- REAR SHOCK:
- Fox Factory Float X, 205 mm x 60 mm
- MOTOR:
- TQ
- MOTOR CONTROLLER:
- TQ
- DISPLAY:
- TQ LED Display with Bluetooth & ANT+ Connectivity
- DRIVE UNIT:
- TQ HPR (60 Nm)
- BATTERY:
- 580 Wh Battery
- RANGE EXTENDER:
- Available for Purchase
- CHARGER:
- TQ 4A charger
- WHEEL SIZE:
- 27.5 R 29 F
- WHEELS:
- Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru-axle, 29" / Rear: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano MicroSpline freehub, Boost148, 12 mm thru-axle, 27.5"
- TYRES:
- Size: S, M, L, XL, XXL Maxxis Assegai, tubeless-ready, 3C, EXO+ casing, MAXXGRIP, folding bead, 29x2.5'' Size: S, M, L, XL, XXL Maxxis Minion DHR II, tubeless-ready, 3C, EXO+ casing, MAXXTERRA, folding bead, 27.5x2.5''
- DROPPER SEATPOST:
- Yes
- SEATPOST:
- Bontrager Line Dropper (MaxFlow, internal, 34.9 mm): S – 150 mm travel / 410 mm length; M – 170 mm / 450 mm; L/XL/XXL – 200 mm / 515 mm
- SADDLE:
- Verse Short Comp, steel rails, 145 mm width
- CRANKSET:
- Premium Alpha Platinum Aluminium frame, top-load PowerPack, integrated cockpit routing, 135x5 mm QR
- STEM:
- Bontrager Elite, 35 mm, 0-degree, 45 mm length
- GRIPS:
- Trek Line Elite, lock-on
- SHIFTERS:
- SRAM Eagle 90, 12-speed
- BRAKE BRAND:
- Sram
- HYDRAULIC BRAKES:
- Yes
- BRAKES:
- SRAM Maven Bronze 4-piston hydraulic disc
- REAR DERAILLEUR:
- SRAM Eagle 90, T-Type
- CHAIN:
- SRAM GX Eagle, T-Type, 12-speed
- NUMBER OF GEARS:
- 12 Speed
- PEDALS:
- Available for Purchase
- FRONT MUDGUARD:
- MTB Monster Mudguard
- EXTRAS:
- Bontrager TLR sealant, 180 ml/6 oz
- TYPE OF BIKE:
- Enduro
- DESIGNED FOR:
- Conquering challenging terrain that mixes technical climbs with rough, steep descents. Its superb balance of weight and downhill capability making it a firm favourite with more aggressive riders.
- IDEAL TERRAIN:
- Excels on downhill sections with features like drops, jumps, rock gardens, and loose scree. Whether you're racing enduro, hitting the bike park, or tackling a black run, an enduro MTB can handle it all.
- PLEASE NOTE:
- Trek reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, and materials.