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Aluminium full-suspension mountain bike Trek Fuel MX 9 XT Di2 lithium grey / trek black splatter 12-speed

Aluminium full-suspension mountain bike Trek Fuel MX 9 XT Di2 grey: electronic XT Di2, Fox 150/160 mm

£5,008.09 Incl. Tax

Color

Gris et Noir

Size

Size charts

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Trek Fuel MX 9 XT Di2 grey: programmable shifting

The Trek Fuel MX 9 XT Di2 Gen 7 combines an Alpha NEXT Platinum alloy frame, Fox Factory suspension (160 mm Fox 36 up front, Float X for 150 mm at the rear) and a 12-speed electronic Shimano XT Di2 groupset. Trek does not publish the weight of this version; for reference: 16.91 kg in a size M for the Fuel MX 9 XT with the identical frame. The Lithium Grey / Trek Black Splatter is a light grey dotted with black.

Technical specifications

Frame	Alpha NEXT Platinum aluminium, integrated storage, adjustable progression, interchangeable rocker and lower shock mount, ABP, threaded BSA 73 bottom bracket, ISCG 05
Suspension	Fox Factory 36 GRIP X2 fork, 160 mm / Fox Factory Float X 205x60 mm shock, 150 mm at the rear
Drivetrain	Electronic Shimano XT Di2 1x12, M8250 long-cage derailleur, M8200 30T crankset (165 or 170 mm depending on size), M8200 10-51 cassette
Brakes	Shimano XT M8220 4-piston hydraulic, RT86 rotors, 203 mm front and 180 mm rear
Wheels / tyres	Bontrager Line Comp 30 / Maxxis Assegai MaxxGrip 29x2.5 front, Minion DHR II MaxxTerra 27.5x2.5 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 34.9 mm dropper post (150 to 200 mm travel depending on size)
Weight	weight not published by Trek for this version; for reference: Fuel MX 9 XT (identical alloy frame) 16.91 kg in a size M

At a glance

✓ Alpha NEXT Platinum alloy	✓ Electronic Shimano XT Di2
✓ Fox Factory 36 and Float X	✓ 203 / 180 mm rotors
✓ 29 front, 27.5 rear wheels	✓ Reference: 16.91 kg (MX 9 XT, M)

Who is it for?

For the mountain biker who loves technology and wants to customise how their drivetrain behaves, or for those who ride a lot and want precise shifting in all circumstances. It will also suit the rider who no longer wants to adjust cable tension.

The LVR workshop view

The frame: Alpha NEXT Platinum, Trek's cutting-edge alloy. Above the Alpha Silver of the Marlin and Alpha Platinum, Alpha NEXT Platinum is reserved for the Gen 7 Fuel. No weight is published for this Di2 version; for scale, Trek gives 4.95 kg for the alloy Gen 7 Fuel EX frameset and 3.31 kg for its carbon equivalent.

	Alpha NEXT Platinum (Fuel 9)	OCLV Mountain (Fuel 9.8 / 9.9)	Alpha Platinum (Slash 8)
Level	Trek's best aluminium	Trek's mountain bike carbon	High-end alloy, one step below NEXT
Designed to	Take knocks at a sensible cost	Save weight, resist impacts	Aluminium enduro frames
Gen 7 Fuel EX frameset (M)	4.95 kg	3.31 kg	not applicable
What it means	Heavier, but unbothered by small knocks	1.64 kg less on the frameset	Previous aluminium generation

Put simply: a tough, affordable frame, with an electronic drivetrain usually reserved for pricier builds.

Shimano XT Di2 lets you program the shifting: shift speed, number of sprockets shifted when holding the button, button functions. The M8250 derailleur shifts precisely, with no drift in adjustment over time as with a stretching cable.

The Fox Factory 36 GRIP X2 and Float X package is the same as on the Fuel MX 9 XT, and the four-piston XT M8220 brakes with 203 and 180 mm rotors provide powerful braking. The frame also has integrated storage to carry the essentials.

Which Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel EX 9 XT Di2	Alpha NEXT Platinum alloy	145 / 150 mm	Shimano XT Di2 1x12	16.88 kg
Fuel MX 9 XT	Alpha NEXT Platinum alloy	150 / 160 mm	Shimano XT 1x12	16.91 kg
Fuel MX 9 XT Di2	Alpha NEXT Platinum alloy	150 / 160 mm	Shimano XT Di2 1x12	not published
Fuel LX 9 XT	Alpha NEXT Platinum alloy	160 / 170 mm	Shimano XT 1x12	17.79 kg

Our take: the MX 9 XT Di2 takes the frame, suspension and brakes of the MX 9 XT (16.91 kg) and adds electronics. The Fuel EX 9 XT Di2 (16.88 kg) offers 145/150 mm for more trail-oriented riding.

LVR sizing advice

If you are on the borderline between two sizes, the shorter one favours agility on twisty trails, the longer one composure on fast descents. Cranks of 165 or 170 mm and a dropper with 150 to 200 mm of travel depending on size.

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

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

Your questions

What can be programmed?	Shift speed, multi-shift and control functions, via the Shimano app.
Does it need charging?	Yes, from time to time; check the charge before a long ride.
Why no claimed weight?	Trek has not published it; the MX 9 XT with the same frame weighs 16.91 kg in M.
Does the grey show marks?	No, the black dots hide small marks well.

The LVR Cycles verdict

A Fuel MX that combines the toughness of an alloy frame with the precision of an electronic Shimano drivetrain. Its light grey dotted with black stays discreet.

Pros
+ Programmable electronic drivetrain
+ Complete Fox Factory suspension
+ Understated speckled light grey

Cons
- Weight not published
- Battery charge to keep an eye on

Why buy from LVR Cycles? As a Trek dealer in Béziers, we configure your XT Di2 to your preferences, carry out the updates and set up the Fox suspension.

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-5351812

Data sheet