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Carbon full-suspension mountain bike Trek Fuel MX 9.8 XT Di2 miami green/aloha marble 12-speed

Carbon full-suspension mountain bike Trek Fuel MX 9.8 XT Di2 teal: wireless XT Di2, Fox Factory, 150/160 mm

zł30,792.58 Incl. Tax

Color

Green

Size

Size charts

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Trek Fuel MX 9.8 XT Di2 Miami Green: shifting without thinking about it

The Trek Fuel MX 9.8 XT Di2 Gen 7 takes the OCLV Mountain carbon frame and Fox Factory suspension (150 mm at the rear, 160 mm fork) of the Fuel MX 9.8 XT, but adopts the wireless Shimano XT Di2 M8250 derailleur. Weight not published by Trek for this version; in a size M, the Fuel EX 9.8 XT weighs 15.28 kg and the Fuel LX 9.8 XT Di2, which shares its drivetrain, 15.97 kg. The Miami Green/Aloha Marble colourway features a vivid teal marbled with soft green.

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 the mountain biker won over by electronics, who wants shifts that are always spot on and customisable, with no cable to clog or tension to readjust. They love technology that serves the riding and keep their kit's updates up to date.

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.

The wireless Di2 derailleur eliminates the cable, the main source of drifting adjustment on a mountain bike: dust, mud and housing compression always end up throwing the indexing out. Here, every press gives a crisp shift, and the behaviour stays identical after months of dusty rides in the garrigue.

Shifting is programmable: you can choose the number of sprockets shifted with a long press or assign the button functions to suit your habits. We carry out these settings and Di2 firmware updates in our workshop, and show you how to charge the drivetrain before a big ride.

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 the same frame and suspension as the 9.8 XT, this 9.8 XT Di2 adds wireless shifting. The 9.9 X0 AXS moves to SRAM electronics with a 170 mm fork and carbon wheels; the Fuel LX 9.8 XT Di2 (15.97 kg in M) keeps the same drivetrain in an enduro version.

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

Is wireless Di2 reliable?	Yes, with no cable, the indexing no longer goes out with dust or mud.
Can the shifting be customised?	Yes, the functions are programmable; we configure them with you in our workshop.
What if the battery is flat?	The derailleur stops shifting: remember to charge before long rides.
Does the teal show the dirt?	Less than white does; a rinse with clean water after muddy rides is enough.

The LVR Cycles verdict

The carbon Fuel MX for the mountain biker who loves the precision of electronics and a drivetrain that no longer needs adjusting. Its teal marbled with soft green sets it apart at first glance.

Pros
+ Wireless XT Di2 derailleur
+ Programmable shifting
+ Original marbled teal

Cons
- Weight not published
- Battery to check before rides

Why buy from LVR Cycles? As a Trek dealer in Béziers, we pair and program your Di2 drivetrain, update its firmware and set up the Fox suspension of your Fuel MX before handover.

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-5349207

Data sheet