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

Carbon full-suspension mountain bike Trek Fuel LX 9.8 XT chameleon green: big days, storage, 160/170 mm

CHF6,128.79 Incl. Tax

Color

Black and green

Size

Size charts

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Trek Fuel LX 9.8 XT Chameleon Green: big days in the mountains

Built around an OCLV Mountain carbon frame with integrated storage, the Trek Fuel LX 9.8 XT Gen 7 combines 160 mm at the rear, a 170 mm Fox 38 fork and a cable-actuated Shimano XT 10-51 drivetrain. As for weight, Trek has published nothing for this version; for reference, the Fuel LX 9.8 XT Di2 with an identical frame weighs 15.97 kg in a size M. Its Gloss Chameleon Green/Matte Black colourway features a glossy chameleon green that shifts with the light, set against a matte black.

Technical specifications

Frame	OCLV Mountain carbon, integrated storage, adjustable progression, interchangeable alloy rockers and lower shock mount, ZS headset, BSA 73 threaded bottom bracket, ISCG 05, ABP, UDH hanger, Boost
Suspension	Fox Factory 38 Float EVOL fork, GRIP X2 cartridge, 170 mm, 44 mm offset / Fox DHX2 coil shock 205 x 65 mm, 160 mm
Drivetrain	Mechanical Shimano XT M8200 1x12: 30T chainring, 10-51 cassette, M8200 long-cage derailleur, 170 mm cranks (165 mm depending on size)
Brakes	Shimano XT M8220 4-piston hydraulic, RT86 203 mm and 180 mm rotors
Wheels / tyres	Bontrager Line Comp 30 / Maxxis Assegai MaxxGrip and Minion DHR II MaxxTerra 29x2.5, EXO+ casing, Tubeless Ready
Cockpit	Race Face Turbine alloy handlebar 35 mm, 40 mm rise / Bontrager Elite stem 45 mm, 0°
Saddle / seatpost	Verse Short Comp steel rails, 145 mm / Bontrager Line Dropper 150 to 200 mm depending on size
Weight	Weight not published by Trek for this version (for reference: Fuel LX 9.8 XT Di2, same carbon frame, 15.97 kg in a size M)

At a glance

✓ OCLV Mountain carbon frame	✓ Enduro 160 mm rear / 170 mm front
✓ Fox DHX2 coil shock	✓ Mechanical Shimano XT 1x12, 10-51
✓ Maxxis 29x2.5 EXO+ tyres	✓ Weight not published (reference 15.97 kg in M)

Who is it for?

For the experienced mountain biker who heads into the mountains for the day, links long climbs and technical descents, and wants a bike that will not let them down far from anywhere. It suits riders who prefer mechanical components they can repair themselves on the trail.

The LVR workshop view

OCLV carbon, Trek's signature. On an enduro mountain bike, carbon is not just about saving weight: the OCLV Mountain version is laid up to withstand rock strikes and botched landings, with Trek's lifetime warranty on the frame. On the Gen 7 Fuel platform, Trek claims a frameset of 3.31 kg in carbon versus 4.95 kg in aluminium (measured on the Fuel EX in a size M).

	OCLV Mountain (Fuel LX 9.8 / 9.9)	Alpha NEXT Platinum (Fuel LX 9)	Alpha Silver (Marlin)
Level	Trek's mountain bike carbon, top end	Trek's best mountain bike aluminium	Entry-level aluminium
Construction	OCLV process, impact reinforcements	Hydroformed tubes, smoothed welds	Simpler tubes, more material
Gen 7 Fuel frameset	3.31 kg (Fuel EX, M)	4.95 kg (Fuel EX, M)	not applicable
What it means	Lively acceleration, lifetime warranty	Robust, gentler on the budget	Reserved for hardtails

Put simply: with an identical drivetrain, the Fuel LX 9.8 XT takes the components of the alloy Fuel LX 9 XT and swaps the frame for carbon. Trek does not publish its weight, but the frameset difference measured on the platform (over 1.6 kg) gives an idea of the gain to expect on the climbs.

In the Caroux massif and along the ridges of the Espinouse, a ride can last several hours far from the road: the frame storage holds an inner tube, a tool and a quick link, freeing up your backpack. A cable drivetrain can be fixed without special tools, a real asset when the nearest shop is miles away.

On these granite rocks, the 2.5-inch Maxxis tyres in EXO+ casing resist cuts better than a light casing, and tubeless set-up prevents most pinch flats. The 51-tooth sprocket lets you stay seated on rocky ramps while keeping rear traction.

Which Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel LX 9 XT	Alpha NEXT Platinum alloy	160 / 170 mm	Mechanical Shimano XT 1x12	17.79 kg
Fuel LX 9.8 XT	OCLV Mountain carbon	160 / 170 mm	Mechanical Shimano XT 1x12	not published
Fuel LX 9.8 XT Di2	OCLV Mountain carbon	160 / 170 mm	Shimano XT Di2 1x12	15.97 kg
Slash 9.8 XT Di2	OCLV Mountain carbon	170 / 170 mm	Shimano XT Di2 1x12	16.63 kg

Our take: for self-sufficiency in the mountains, the mechanical XT drivetrain is a reassuring choice. The 9.8 XT Di2 brings electronic shifting for a published weight of 15.97 kg; the Fuel LX 9 XT keeps cable XT in aluminium, at 17.79 kg.

LVR sizing advice

The Fuel LX is chosen first according to the rider's height: 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	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

What should I keep in the storage?	Inner tube, tyre levers, mini-tool and quick link: everything for trailside repairs.
Can it handle long climbs?	Yes, the 30x51 is very low; just keep a steady pace.
Tyres suited to rocks?	Yes, the EXO+ casing protects well; an anti-pinch insert can be added.
Does the chameleon green really change?	Yes, its shade shifts with the angle and the light, from green to darker tints.

The LVR Cycles verdict

A carbon Fuel LX designed for long days in the mountains, with a drivetrain you can fix anywhere. Its colour-shifting chameleon green sets it apart on the ridges.

Pros
+ Very practical integrated storage
+ Mechanical parts easy to fix
+ Colour-shifting chameleon green

Cons
- Weight not published by Trek
- Steel-railed saddle

Why buy from LVR Cycles? In Béziers, we prepare your Fuel LX for the mountains: tubeless with inserts if needed, suspension set-up, and advice on the repair kit to slip into the frame.

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-5355974

Data sheet