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Carbon full-suspension mountain bike Trek Fuel LX 9.8 XT Di2 purple phaze/amethyst marble 12-speed

Carbon full-suspension mountain bike Trek Fuel LX 9.8 XT Di2 purple: timed enduro, Fox 38, 15.97 kg in M

$8,027.40 Incl. Tax

Color

Violet et Noir

Size

Size charts

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Trek Fuel LX 9.8 XT Di2 Purple Phaze: the weapon for timed stages

Designed to go fast between the tapes, the Trek Fuel LX 9.8 XT Di2 Gen 7 brings together an OCLV Mountain carbon frame, a 160 mm Fox DHX2 coil, a 170 mm Fox Factory 38 fork and the electronic Shimano XT Di2 drivetrain. It weighs 15.97 kg in a size M according to Trek, and is offered from size S to size XXL. Its Purple Phaze/Amethyst Marble paintwork combines an intense purple with amethyst-coloured marbling.

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 racer who competes in enduro and wants to gain time on the transfers as well as the stages. It is aimed at the rider who wants a light bike to arrive fresh at the start, and a precise one to accelerate out of corners.

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 a stage, accelerations come down to a handful of pedal strokes: electronic shifting lets you drop several sprockets at once before a hairpin, without losing your rhythm. The Fox 38's GRIP X2 damper separates compression and rebound adjustments into high and low speed, letting you fine-tune the fork for a given track.

The DHX2 also has high- and low-speed adjustments for both compression and rebound. Before a race, we start from a neutral baseline and then adjust click by click based on your feedback: the suspension should let you push hard without bottoming out or bucking.

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: for racing, the 9.8 XT Di2 offers the best balance between published weight and adjustable suspension in the LX family. The Slash 9.8 XT Di2 weighs 660 g more with 170 mm at the rear, a choice better suited to very steep tracks.

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

Light enough for the transfers?	Yes, 15.97 kg in M is a reasonable weight for a coil-sprung enduro bike.
How many suspension adjustments?	Fork and shock adjust for compression and rebound, at high and low speed.
Which sizes are available?	This colour is offered from S to XXL, for riders from 155 to 203 cm.
Does the purple marbling vary?	Yes, each frame has slightly different marbling.

The LVR Cycles verdict

A light, finely adjustable carbon enduro bike, built to gain time on timed stages. Its intense purple marbled with amethyst catches the eye on the start line.

Pros
+ Suspension adjustable at high and low speed
+ Light for a coil-sprung bike
+ Sizes S to XXL

Cons
- Many settings to master
- Di2 battery to plan ahead before a race

Why buy from LVR Cycles? As a Trek dealer in Béziers, we establish a suspension baseline with you, check the Di2 charge and service your Fuel LX between races.

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-5351759

Data sheet