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

Aluminium full-suspension mountain bike Trek Fuel LX 9 Eagle 90 grey: Fox 38 and DHX2, 160/170 mm, 17.38 kg

CHF4,847.95 Incl. Tax

~~CHF5,213.91~~ MSRP

Recommended supplier selling price in 2026

Color

Gris et Noir

Size

Size charts

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Trek Fuel LX 9 Eagle 90 Lithium Grey: alloy enduro with Fox Factory

The Gen 7 Trek Fuel LX 9 Eagle 90 is the enduro version of the Fuel platform: 160 mm of travel at the rear, 170 mm at the front, with a Fox 38 Factory up front and a coil DHX2 at the back, weighing 17.38 kg in size M. The mechanical SRAM Eagle 90 drivetrain and Maven Bronze brakes complete a build designed for descending. This Lithium Grey/Trek Black Splatter colour dresses the frame in a lithium grey dotted with black splashes.

Technical specifications

Frame	Alpha NEXT Platinum aluminium, in-frame storage, adjustable progression, interchangeable rocker and lower shock mount, ABP pivot, threaded BSA 73 bottom bracket, ISCG 05, down tube protection
Suspension	Fox Factory 38 Float EVOL fork, GRIP X2 damper, 170 mm / Fox DHX2 coil shock 205 x 65 mm, 160 mm
Drivetrain	Mechanical SRAM Eagle 90 T-Type 1x12, steel 30T 170 mm chainset, 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 (front) and Minion DHR II MAXXTERRA (rear), 29 x 2.5, EXO+ casing, Tubeless Ready
Cockpit	Race Face Turbine alloy 35 mm handlebar, 40 mm rise; Bontrager Elite 45 mm stem
Saddle / seatpost	Verse Short Comp 145 mm / Bontrager Line Dropper 170/200 mm dropper post depending on size, 34.9 mm
Weight	17.38 kg in size M (Trek figure, with tubeless sealant)

At a glance

✓ Enduro, 160 mm rear / 170 mm front	✓ Fox 38 Factory and DHX2 coil
✓ SRAM Eagle 90 1x12, 10-52	✓ Maven Bronze 4-piston brakes
✓ 2.5 Assegai and DHR II	✓ 17.38 kg in size M

Who is it for?

This bike is aimed at the rider who spends Sundays on regional enduro stages or at the bike park, and wants a bike that can pedal itself back to the top of the trails. It also suits the trail rider who has gained confidence and wants more margin on steep, rough sections.

The LVR workshop view

Alpha NEXT Platinum aluminium, the pinnacle of Trek alloy. Trek grades its alloys in three tiers: Alpha Silver for the Marlin, Alpha Platinum for more committed models, and Alpha NEXT Platinum, reserved for the Gen 7 Fuel models. It is the latter that this Fuel LX 9 uses. The frame gets everything that makes the platform: adjustable progression, interchangeable kinematic parts, integrated storage, threaded bottom bracket and ISCG 05 mounts for a chain guide.

	Alpha NEXT Platinum (Fuel LX 9)	OCLV Mountain (Fuel LX 9.8)	Alpha Platinum (Slash 8)
Level	Trek's best MTB aluminium, reserved for Gen 7 Fuels	Trek's mountain bike carbon	Aluminium from the range above
Construction	Alloy engineered for strength, highly adjustable frame	OCLV layup tuned for impact resistance	Tough alloy, simpler kinematics
Reference bike	Gen 7 alloy Fuel EX frameset: 4.95 kg (M)	Gen 7 carbon Fuel EX frameset: 3.31 kg (M)	Complete Slash 8: 16.68 kg (M)
What it means	Takes knocks, more affordable	About 1.6 kg less on the frameset	170 mm alloy enduro, less adjustable

Put simply: on an enduro bike, aluminium is not a cut-price choice. It takes rock strikes and crashes without worry, and the alloy frameset weighs only about 1.6 kg more than its carbon equivalent (Trek measurement on the Fuel EX).

The Fox 38 Factory and DHX2 pairing is a benchmark in gravity riding. The fork's GRIP X2 damper separates high- and low-speed compression and rebound: enough to fine-tune behaviour on big hits without losing sensitivity. At the rear, the DHX2's coil spring stays glued to the ground over successive rocks and heats up less than an air shock on long descents.

On the Caroux singletrack, where slabs alternate with rock steps, this fine-tuning makes the difference. We prepare every Fuel LX in the workshop: spring choice according to your weight, sag, rebound and baseline compression settings. It is the step that turns a good bike into a bike that suits you.

Which Fuel should you choose?

Model	Frame	Drivetrain	Travel rear / front	Weight (M)
Fuel MX 9 Eagle 90	Alpha NEXT Platinum alloy	Mechanical SRAM Eagle 90	150 / 160 mm	16.78 kg
Fuel LX 9 Eagle 90	Alpha NEXT Platinum alloy	Mechanical SRAM Eagle 90	160 / 170 mm	17.38 kg
Fuel LX 9 XT	Alpha NEXT Platinum alloy	Mechanical Shimano XT	160 / 170 mm	17.79 kg
Fuel LX 9.8 XT Di2	OCLV Mountain carbon	Wireless Shimano XT Di2	160 / 170 mm	15.97 kg

Our take: at 17.38 kg in M, this LX 9 Eagle 90 weighs 600 g more than the Fuel MX 9 Eagle 90, which makes do with 150 / 160 mm. The LX 9 XT adds 410 g; to get down towards 16 kg, you need the carbon of the 9.8 XT Di2.

LVR sizing advice

Between two sizes, the smaller one makes the bike more playful in hairpins, the larger one more stable at high speed. Dropper post travel increases with size.

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

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

Your questions

Is a coil shock really useful?	Yes in enduro: it tracks the terrain better and does not overheat on long descents; it is chosen according to your weight.
Can you pedal back up?	Yes, with 30 x 52 gearing and the dropper post, technical climbs remain manageable at a steady pace.
Can a chain guide be fitted?	Yes, the frame has ISCG 05 mounts for a chain guide.
Which sizes for this colour?	M and L, for riders from 165 to 188 cm.

The LVR Cycles verdict

An aluminium enduro bike with no compromise on suspension, ready for regional races and the bike park. Its black-speckled grey stays understated and hides dirt marks well.

Pros
+ Fox 38 Factory and coil DHX2
+ Highly adjustable alloy frame
+ Discreet grey finish

Cons
- 17.38 kg: you earn every climb
- Only two sizes in this colour

Why buy from LVR Cycles? As a Trek retailer in Béziers, we choose the DHX2 spring with you, set up the suspension and fit the tyres tubeless before your first stage.

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-5335005

Data sheet