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Carbon full-suspension mountain bike Trek Fuel MX 9.8 XT Di2 gloss chameleon green/matte black 12-speed

Carbon full-suspension mountain bike Trek Fuel MX 9.8 XT Di2 chameleon green: XT brakes, Di2, 150/160 mm

$7,804.38 Incl. Tax

Color

Black and green

Size

Size charts

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Trek Fuel MX 9.8 XT Di2 Chameleon Green: the partner for demanding mountain bike events

The Trek Fuel MX 9.8 XT Di2 Gen 7 is an all-mountain bike in OCLV Mountain carbon: Fox Factory suspension with 150 mm at the rear and 160 mm up front, 29 and 27.5-inch wheels, a wireless electronic Shimano XT Di2 drivetrain and 4-piston XT brakes. Weight not published by Trek for this version; Trek does, however, claim 15.28 kg for the Fuel EX 9.8 XT and 15.97 kg for the Fuel LX 9.8 XT Di2 in a size M. The Gloss Chameleon Green/Matte Black colourway pairs a glossy chameleon green, whose hue changes with the light, with a matte black.

Technical specifications

Frame	OCLV Mountain carbon, integrated storage, adjustable progression, interchangeable rocker link and lower shock mount, down tube and transport protection, threaded BSA 73 bottom bracket, ISCG 05, ABP, UDH hanger, Boost
Suspension	Fox Factory 36 Float EVOL fork, GRIP X2 damper, 160 mm / Fox Factory Float X shock 205 x 60 mm, 150 mm at the rear
Drivetrain	Wireless Shimano XT Di2 M8250 1x12, programmable, XT M8200 30T crankset, XT 10-51 cassette
Brakes	Shimano XT M8220 4-piston hydraulic, RT86 203 and 180 mm rotors
Wheels / tyres	Bontrager Line Comp 30 / mixed set-up: Maxxis Assegai 29x2.5 MaxxGrip up front, Minion DHR II 27.5x2.5 MaxxTerra at the rear, EXO+, Tubeless Ready
Cockpit	Race Face Turbine alloy 35 mm handlebar (40 mm rise), Bontrager Elite 45 mm stem, Trek Line Elite grips
Saddle / seatpost	Verse Short Comp 145 mm / Bontrager Line Dropper post, 150 to 200 mm of travel depending on size
Weight	Weight not published by Trek for this version; references in a size M: Fuel EX 9.8 XT 15.28 kg, Fuel LX 9.8 XT Di2 15.97 kg

At a glance

✓ OCLV Mountain carbon	✓ Wireless Shimano XT Di2
✓ Fox Factory 150 / 160 mm	✓ Programmable shifting
✓ Maxxis Assegai / DHR II tyres	✓ Weight n/a; reference LX 9.8 XT Di2 15.97 kg (M)

Who is it for?

For riders taking part in organised mountain bike rides and raids in the region, covering 40 to 60 km routes with great technical descents. They want a bike that is reliable from start to finish and makes up for rider fatigue at the end of the route.

The LVR workshop view

OCLV Mountain carbon, Trek's signature. OCLV carbon comes from compacting the fibre layers to eliminate internal air bubbles, the weak points of a frame. For its mountain bikes, Trek uses the OCLV Mountain variant, whose layup is calibrated to withstand rocks and jumps. The Fuel MX 9.8 XT Di2 benefits from it with guided internal cable routing, even cleaner with a wireless derailleur, and Trek's lifetime warranty on the frame.

	OCLV Mountain (Fuel MX 9.8 / 9.9)	Alpha NEXT Platinum (Fuel MX 9)	Carbon Fuel EX / LX
Level	Trek's mountain bike carbon, tuned for impacts	Trek's most advanced aluminium	Same Gen 7 Fuel platform
Construction	Plies compacted under heat and pressure	Alpha NEXT Platinum alloy	Identical OCLV Mountain carbon
Gen 7 Fuel frameset (M)	3.31 kg (Fuel EX figure)	4.95 kg (Fuel EX figure)	3.31 kg for the EX
What it means	Around 1.6 kg less on the frame, lifetime warranty	Heavier, gentler on the budget	145 / 150 mm (EX) or 160 / 170 mm (LX)

Put simply: the frame and suspension are those of the 9.8 XT. The difference lies in the wireless XT Di2 M8250 derailleur with programmable shifting: a gain in everyday convenience and an adjustment that no longer drifts, not more advanced suspension.

At the end of a long ride, it is clear-headedness that drops: the 4-piston Shimano XT M8220 brakes, with 203 and 180 mm rotors, need little lever effort, which eases the strain on your forearms on the last descent. Meanwhile, Di2 guarantees an accurate shift even when you press the button a little late.

The Maxxis tyres form a classic all-mountain pairing: Assegai in soft MaxxGrip compound up front for cornering grip, Minion DHR II in MaxxTerra at the rear for braking and longevity. Set up tubeless with their EXO+ casing, they limit punctures, the dread of every raid participant.

Which Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel MX 9.8 XT	OCLV Mountain carbon	150 / 160 mm	Shimano XT 1x12	not disclosed
Fuel MX 9.8 XT Di2	OCLV Mountain carbon	150 / 160 mm	Wireless Shimano XT Di2	not published
Fuel MX 9.9 X0 AXS	OCLV Mountain carbon	150 / 170 mm	Wireless SRAM X0 AXS	not disclosed
Fuel LX 9.8 XT Di2	OCLV Mountain carbon	160 / 170 mm	Wireless Shimano XT Di2	15.97 kg

Our take: with identical Fox suspension, the 9.8 XT does the same job with a cable derailleur. The 9.9 X0 AXS goes up to 170 mm up front; the Fuel LX 9.8 XT Di2 (15.97 kg in M) shares the Di2 drivetrain and extends travel by 10 mm at each wheel.

LVR sizing advice

Torn between two sizes: the shorter one for a lively bike that is easy to place, the longer one if you mainly ride fast on steep slopes. Here, only the dropper post travel varies from one size to another.

Size	S	M	L	XL	XXL
Rider height (cm)	155-165	165-177	177-188	188-195	195-203
Inseam (cm)	74-78	79-83	84-89	89-91	91-97
Dropper post (mm)	150	170	200	200	200

Source: Trek size guide. Bike fitting available in our Béziers shop.

Your questions

Suitable for 60 km raids?	Yes, its suspension and 51-tooth sprocket make long routes accessible.
Which replacement tyres?	The Assegai front and DHR II rear pairing remains a good base; we advise according to the season.
Do the brakes need bleeding often?	Regular bleeding according to use keeps a firm lever; we do it in our workshop.
Is the chameleon green discreet?	Not really: its colour-shifting tints catch the eye, especially in the sun.

The LVR Cycles verdict

The ideal carbon Fuel MX for linking mountain bike events and demanding raids, with a wireless drivetrain and brakes that spare the rider. Its glossy chameleon green does not go unnoticed on the start line.

Pros
+ Powerful, smooth XT brakes
+ Quality tubeless Maxxis tyres
+ Spectacular chameleon green

Cons
- Weight not published
- Di2 battery to charge the night before

Why buy from LVR Cycles? In Béziers, we prepare your Fuel MX before your events and raids: pad check, brake bleed, tubeless sealant top-up and Di2 drivetrain charge.

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

Reference TRK-5356024

Data sheet