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

Carbon full-suspension mountain bike Trek Fuel EX 9.8 XT purple: S to XXL, mixed wheels in S, 15.28 kg in M

$10,542.39 Incl. Tax

Color

Violet et Noir

Size

Size charts

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Trek Fuel EX 9.8 XT Purple Phaze: a carbon trail bike for every build

Available from S to XXL, the Trek Fuel EX 9.8 XT Gen 7 adapts its wheels and dropper post to each size: a mixed 29 / 27.5-inch set-up in S, 29 inches everywhere else, and a 150 to 200 mm post. OCLV Mountain carbon frame, 145 / 150 mm Fox Factory suspension and 12-speed Shimano XT, for 15.28 kg in size M. Purple Phaze/Amethyst Marble layers a dark purple with marbled amethyst veins.

Technical specifications

Frame	OCLV Mountain carbon, integrated storage, adjustable progression, threaded BSA 73, ISCG 05, UDH hanger, Boost
Suspension	Fox Factory 36 GRIP X2 150 mm / Fox Factory Float X 145 mm
Drivetrain	Mechanical Shimano XT 1x12, long-cage M8200 derailleur, XT M8200 30T chainset, XT M8200 10-51 cassette
Brakes	Shimano XT M8220 4-piston hydraulic, RT86 203 mm (front) and 180 mm (rear) rotors
Wheels / tyres	Bontrager Line Comp 30 aluminium / Maxxis Minion DHF (front) and DHR II (rear) 2.5, EXO+, 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, 150 to 200 mm depending on size
Weight	15.28 kg in size M (Trek figure, with tubeless sealant)

At a glance

✓ OCLV Mountain carbon, integrated storage	✓ Fox Factory 36 GRIP X2 and Float X
✓ 145 mm rear, 150 mm front	✓ 12-speed Shimano XT 10-51
✓ 4-piston XT brakes, 203 mm rotor	✓ 15.28 kg in size M

Who is it for?

For shorter mountain bikers, who are often poorly served by full-suspension bikes, and more broadly for anyone who wants a bike that is truly sized to their build. The S, intended for 155 to 165 cm, gets a 27.5-inch rear wheel that frees up space behind the saddle.

The LVR workshop view

OCLV carbon, Trek's signature. Trek has made its carbon frames using the OCLV process since 1992: heat and pressure drive out air bubbles between the fibre layers. For mountain biking, the brand developed OCLV Mountain, whose layup is calibrated to withstand rock strikes, landings and crashes, whereas road carbon mainly aims for lightness. The Fuel EX 9.8 XT benefits from it with a 3.31 kg frame kit in M, covered by Trek's lifetime warranty.

	OCLV Mountain (Fuel EX 9.8 / 9.9)	Alpha NEXT Platinum (Fuel EX 5 to 9)	Road OCLV (Madone, Domane)
Level	Off-road version of OCLV carbon	High-end MTB aluminium	Trek road bike carbon
Construction	Layers reinforced in impact zones	Hydroforming, tuned wall thicknesses	Layers optimised for weight
Fuel EX frameset (M)	3.31 kg	4.95 kg	not applicable
What it means	Lighter and livelier when accelerating	Tough, but 1.64 kg heavier	Different use, different stresses

In short: with comparable Fox Factory suspension, the 9.8 XT weighs 15.28 kg in M, 1.86 kg less than the aluminium Fuel EX 9 XT (17.14 kg). Most of the difference comes from the frame, and a lighter frame is felt at every acceleration and on every climb.

The mixed set-up on size S is no minor detail: a smaller rear wheel leaves more room to shift your hips back on steep slopes without your backside touching the tyre. The front stays at 29 inches, which rolls over obstacles better and holds speed. It is a real plus for smaller riders on the steep trails of the Caroux.

The Bontrager Line Dropper post grows with the frame: 150 mm in S, 170 mm in M, 200 mm from L. A saddle that drops low is the key to feeling at ease on descents; at handover, we check that the insertion length suits your inside leg.

Which Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel EX 9 XT	Alpha NEXT Platinum alloy	145 / 150 mm	Mechanical Shimano XT	17.14 kg
Fuel EX 9.8 XT	OCLV Mountain carbon	145 / 150 mm	Mechanical Shimano XT	15.28 kg
Fuel EX 9.8 XT Di2	OCLV Mountain carbon	145 / 150 mm	Wireless Shimano XT Di2	not disclosed
Fuel LX 9.8 XT Di2	OCLV Mountain carbon	160 / 170 mm	Wireless Shimano XT Di2	15.97 kg

Our take: in every size, the 9.8 XT keeps the same Fox Factory suspension. For a smaller rider, every kilo counts even more: compared with the aluminium Fuel EX 9 XT (17.14 kg in M), carbon makes a real difference.

LVR sizing advice

If you are between two sizes, choose the shorter one for a lively bike on twisty trails, the longer one for more stability on fast descents. Dropper post travel grows with the frame.

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
Wheels front / rear (in)	29 / 27.5	29 / 29	29 / 29	29 / 29	29 / 29

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

Your questions

Why a 27.5-inch wheel in S?	To free up space behind the saddle for smaller riders and make steep descents easier.
Which size for 1.75 m?	The M covers 165 to 177 cm; depending on your inside leg, we confirm it in the shop.
Is the post adjustable?	It is operated from the bar; its length depends on frame size.
Does the purple age well?	Yes, the amethyst marbling hides small signs of wear well.

The LVR Cycles verdict

A carbon trail bike that looks after every build, from the smallest with the mixed set-up to the tallest in XXL. The amethyst-marbled purple gives it an understated charm.

Pros
+ Well-thought-out mixed set-up in S
+ Dropper post matched to size
+ Elegant purple finish

Cons
- 15.28 kg in M, not a featherweight
- Stock aluminium wheels

Why buy from LVR Cycles? As a Trek dealer in Béziers, we help you choose the right size and adjust the dropper post and suspension to your build before handover.

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-5348922

Data sheet