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Aluminium full-suspension mountain bike Trek Fuel MX 9 Eagle 90 Fox lithium grey/trek black splatter 12-speed

Aluminium full-suspension mountain bike Trek Fuel MX 9 Eagle 90 grey: Fox Factory 150/160 mm, 29/27.5, 16.78 kg

€5,109.00 Incl. Tax

~~€5,499.00~~ MSRP

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Color

Gris et Noir

Size

Size charts

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Description
Product Details

Trek Fuel MX 9 Eagle 90 grey: simple, effective alloy all-mountain

The Gen 7 Trek Fuel MX 9 Eagle 90 is the all-mountain version of the Fuel: 150 mm of rear travel, a 160 mm Fox Factory 36 fork and an Alpha NEXT Platinum aluminium frame, weighing 16.78 kg in size M. Its mechanical SRAM Eagle 90 T-Type drivetrain puts reliability ahead of sophistication. The Lithium Grey/Trek Black Splatter colour dresses the frame in a mineral grey dotted with small black splatters.

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	Mechanical SRAM Eagle 90 T-Type 1x12, 30T chainring, XS-1275 10-52 cassette
Brakes	SRAM Maven Bronze hydraulic 4-piston, HS2 200 and 180 mm rotors
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	16.78 kg in size M (Trek figure, with tubeless sealant, no inner tubes)

At a glance

✓ Alpha NEXT Platinum alloy frame	✓ Fox Factory 36 and Float X
✓ Mixed 29 / 27.5 wheels	✓ SRAM Eagle 90 T-Type 10-52
✓ Maven Bronze 4-piston brakes	✓ 16.78 kg in size M

Who is it for?

For the mountain biker who already rides trail and feels their bike reaching its limits as soon as the descent gets steeper, or for the rider who wants a single mountain bike able to complete a big loop in the Caroux and then ride the bike park. It is offered here in sizes M and L.

The LVR workshop view

Alpha NEXT Platinum aluminium, the pinnacle of Trek alloy. Trek grades its aluminium in three tiers: Alpha Silver on the Marlin, Alpha Platinum above it, and Alpha NEXT Platinum, reserved for the 7th generation of the Fuel. It is the latter that forms the base of the Fuel MX 9 Eagle 90. On the Fuel EX of the same generation, the alloy frameset weighs 4.95 kg in M, against 3.31 kg for the carbon version: the gap is real, but a well-made alloy frame takes rocks and crashes without leaving you worrying about the slightest invisible crack.

	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: with the same drivetrain, this alloy Fuel MX amounts to a complete bike capable of the same descents as the carbon 9.8. The extra grams are felt mainly on long climbs; on descents, the stability of a slightly heavier frame is no bad thing.

Fox Factory suspension is the heart of this build: the GRIP X2 damper in the 36 fork separates high- and low-speed compression and rebound adjustments, and the Float X shock offers a wide operating range. In the workshop, we always start with sag and rebound; they are what makes the difference in rock gardens.

Choosing a mechanical Eagle 90 drivetrain is reassuring for intensive use: no battery to monitor, parts that are easy to find and cable adjustment anyone can manage. The 10-52 cassette paired with the 30-tooth chainring gives you enough to climb the steepest forest tracks while staying seated.

Which Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel EX 9 Eagle 90	Alpha NEXT Platinum alloy	145 / 150 mm	SRAM Eagle 90 1x12	16.58 kg
Fuel MX 9 Eagle 90 (Fox)	Alpha NEXT Platinum alloy	150 / 160 mm	SRAM Eagle 90 1x12	16.78 kg
Fuel MX 9 XT	Alpha NEXT Platinum alloy	150 / 160 mm	Shimano XT 1x12	16.91 kg
Fuel LX 9 Eagle 90	Alpha NEXT Platinum alloy	160 / 170 mm	SRAM Eagle 90 1x12	17.38 kg

Our take: compared with the Fuel EX 9 Eagle 90 (16.58 kg), this MX adds 5 mm at the rear and 10 mm at the front for 200 g more. The Fuel LX 9 Eagle 90 moves to 160/170 mm but weighs 17.38 kg: it is an enduro bike, less at ease on climbs.

LVR sizing advice

Hesitating between two sizes: the smaller one makes the bike playful in tight corners, the larger one makes it more composed at high speed. Dropper post travel increases with size, from 150 to 200 mm.

Size	M	L
Rider height (cm)	165-177	177-188
Inseam (cm)	79-83	84-89
Dropper post (mm of travel)	170	200

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

Your questions

Versatile enough for trail riding?	Yes, with 30x52 gearing and a 170 to 200 mm dropper post, long loops remain within reach.
Why two wheel sizes?	The 29-inch front rolls over obstacles better, the 27.5 rear makes the bike more playful.
Which sizes are available?	This version is offered in M and L; we check the size with you in store.
Does the speckled grey show marks?	No, the black splatters hide small scratches and dust well.

The LVR Cycles verdict

A no-frills Fuel MX whose Fox Factory suspension clearly plays in the category above. Its black-speckled grey stays discreet and ages well.

Pros
+ Full Fox Factory suspension
+ Easy-to-live-with mechanical drivetrain
+ Grey finish that hides wear

Cons
- 16.78 kg: no featherweight
- Only two sizes offered

Why buy from LVR Cycles? In Béziers, we set the Fox suspension to your weight at handover, set up the wheels tubeless and look after your Fuel season after season.

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-5334904

Data sheet