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Carbon full-suspension mountain bike Trek Fuel LX 9.8 XT Di2 gloss chameleon green/matte black 12-speed

Carbon full-suspension mountain bike Trek Fuel LX 9.8 XT Di2 chameleon green: tall riders, 15.97 kg in M

£6,009.88 Incl. Tax

Color

Black and green

Size

Size charts

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Trek Fuel LX 9.8 XT Di2 Chameleon Green: the carbon enduro bike for tall riders

Available from size S to XXL, the Trek Fuel LX 9.8 XT Di2 Gen 7 offers its OCLV Mountain carbon frame, Shimano XT Di2 drivetrain and 170 mm Fox 38 and 160 mm DHX2 suspension to riders of every build. Trek claims 15.97 kg in a size M. The Gloss Chameleon Green/Matte Black colourway plays a glossy, colour-shifting chameleon green against a matte black base.

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	Shimano XT Di2 M8250 1x12 with wireless shifter: 30T chainring, XT 10-51 cassette, XT M8200 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	15.97 kg in size M (Trek figure, with tubeless sealant)

At a glance

✓ OCLV Mountain carbon frame	✓ 160 mm rear / 170 mm front
✓ Programmable Shimano XT Di2 1x12	✓ Fox DHX2 coil and Fox 38 fork
✓ Integrated frame storage	✓ 15.97 kg in size M

Who is it for?

For the tall mountain biker, from 188 to 203 cm, who often struggles to find a carbon enduro bike in their size and wants a seatpost long enough to pedal properly. It also suits medium-height riders looking for a complete, uncompromising bike.

The LVR workshop view

OCLV carbon, Trek's signature. For its mountain bikes, Trek adapts its OCLV process into a Mountain version: the fibres are oriented and reinforced where an enduro frame takes the hits, under the down tube and around the pivots. The result is a frame that is lighter than aluminium without being more fragile, covered by Trek's lifetime warranty. On the Gen 7 Fuel platform, the frame kit difference reaches 1.64 kg in size M according to Trek (3.31 kg versus 4.95 kg, measured on the Fuel EX).

	OCLV Mountain (Fuel LX 9.8 / 9.9)	Alpha NEXT Platinum (Fuel LX 9)	Alpha Silver (Marlin)
Level	Trek's most advanced mountain bike carbon	Higher-grade MTB aluminium	Entry-level aluminium
Construction	OCLV layers reinforced in impact zones	Hydroforming, neat welds	Standard tubes
Complete Fuel LX (M)	15.97 kg (9.8 XT Di2)	17.79 kg (9 XT)	not applicable
What it means	1.82 kg less to haul uphill	Heavier, more affordable	Hardtail range

In short: 15.97 kg in size M for a 160 / 170 mm coil-sprung bike is the lowest published weight in the whole Fuel LX family. Compared with the aluminium Fuel LX 9 XT, the 1.82 kg difference comes from the carbon frame but also from the Di2 drivetrain, which is lighter than the cable version.

On sizes L, XL and XXL, Trek fits a Bontrager Line Dropper with 200 mm of travel: the saddle can drop right out of the way on descents while returning to the correct height for long climbs. For a tall rider, that is the difference between an efficient pedalling position and a saddle that is always too low.

A heavy or tall rider works the suspension harder: the DHX2 spring is chosen according to weight, and the Fox 38 fork is set with air pressure. We start from your measurements to find the right combination, then adjust the sag after a first ride.

Which Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel MX 9 XT	Alpha NEXT Platinum alloy	150 / 160 mm	Mechanical Shimano XT 1x12	16.91 kg
Fuel LX 9 XT	Alpha NEXT Platinum alloy	160 / 170 mm	Mechanical Shimano XT 1x12	17.79 kg
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: in every size, this 9.8 XT Di2 keeps 160/170 mm; its reference weight is 15.97 kg in M. The alloy Fuel LX 9 XT weighs 17.79 kg, and the Slash 9.8 XT Di2 goes up to 16.63 kg for 10 mm more at the rear.

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

I am 2 m tall, which size?	The XXL covers riders from 195 to 203 cm according to the Trek guide.
Does the spring suit my weight?	It can be swapped according to your weight: we choose the right rate in our workshop.
200 mm dropper on every size?	No, 150 mm in S, 170 mm in M and 200 mm from L to XXL.
Does the chameleon green fade?	No, it keeps its tints with gentle care and no abrasive polish.

The LVR Cycles verdict

A carbon enduro bike that also caters for tall riders, with sizes up to XXL and a 200 mm dropper. Its colour-shifting chameleon green makes it recognisable at first glance.

Pros
+ Sizes S to XXL
+ 200 mm dropper from L
+ Colour-shifting chameleon green

Cons
- Spring to adapt for heavy riders
- Stock alloy handlebar

Why buy from LVR Cycles? As a Trek dealer in Béziers, we help you choose the size, match the spring to your weight and set up your Fuel LX during a bike fit session in store.

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-5355984

Data sheet