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Carbon full-suspension mountain bike Trek Fuel EX 9.8 Eagle 90 purple phaze/amethyst marble 12-speed

Carbon full-suspension mountain bike Trek Fuel EX 9.8 Eagle 90 purple: trail climber, 10-52, 145/150 mm

€6,499.00 Incl. Tax

Color

Violet et Noir

Size

Size charts

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Description
Product Details

Trek Fuel EX 9.8 Eagle 90 Purple Phaze: climbing on carbon to descend better

Designed for long trail loops, the Trek Fuel EX 9.8 Eagle 90 Gen 7 brings together an OCLV Mountain carbon frame, 145 mm of rear travel, 150 mm at the front and a 12-speed SRAM 10-52 cassette. Trek does not publish its weight for this version: as a reference, the 9.8 XT with the identical frame comes in at 15.28 kg in size M. The Purple Phaze/Amethyst Marble finish pairs a deep purple with marbled amethyst veins, dark from a distance, shimmering in the sun.

Technical specifications

Frame	OCLV Mountain carbon, integrated storage, adjustable progression, threaded BSA 73, ISCG 05, UDH hanger, Boost
Suspension	RockShox Lyrik Ultimate Charger 3.1 RC 150 mm / Super Deluxe Ultimate RC2T 145 mm
Drivetrain	Mechanical SRAM Eagle 90 T-Type 1x12, 30T steel chainring, XS-1275 10-52 cassette, GX Eagle chain
Brakes	SRAM Maven Bronze 4-piston hydraulic, HS2 200 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 post, 150 to 200 mm depending on size
Weight	Weight not published by Trek for this version; reference: Fuel EX 9.8 XT, identical carbon frame, 15.28 kg in size M

At a glance

✓ OCLV Mountain carbon frame	✓ RockShox Lyrik and Super Deluxe Ultimate
✓ 145 mm rear, 150 mm front	✓ SRAM Eagle 90 T-Type 10-52
✓ Maven Bronze 4-piston brakes	✓ Weight not published (reference 15.28 kg)

Who is it for?

For the endurance mountain biker who racks up 1,000 metres of climbing or more on a ride and wants a bike that can climb for a long time without wearing them out, then pay them back on the descent. It is also aimed at riders who head out self-sufficient for the day and appreciate storing tools and an inner tube in the frame.

The LVR workshop view

OCLV carbon, Trek's signature. For mountain biking, Trek adapts its OCLV process into a Mountain version: the fibre sheets are still heat-compacted under pressure to eliminate micro-voids, but the layup prioritises resistance to rock strikes and crashes over saving grams. On the Gen 7 Fuel EX, the carbon frame kit weighs 3.31 kg in size M, versus 4.95 kg for the Alpha NEXT Platinum aluminium version, and it is 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	Trek's mountain bike carbon	Trek's best MTB aluminium	Road carbon, OCLV 500 to 900
Construction	Layup focused on impact resistance	Hydroformed tubes, dressed welds	Layup focused on lightness and stiffness
Fuel EX frameset (M)	3.31 kg	4.95 kg	not applicable
What it means	1.64 kg lighter than aluminium, same geometry	Heavier, gentler on the budget	Not designed for MTB impacts

In short: the 9.8 Eagle 90 is the entry point to the carbon Fuel EX, and it makes a clear-cut choice: the budget goes into the frame and the RockShox Ultimate suspension, the same as on the 9.9, while the drivetrain stays mechanical and simple. Trek does not publish its weight; the 9.8 XT, with the same frame, serves as a reference at 15.28 kg in M.

The down tube hatch changes the way you head out on long rides: multi-tool, tubeless repair plugs and a spare tube travel safely tucked away, with no backpack heating up your back in the middle of a Béziers summer. You also keep a low centre of gravity, which you feel through linked corners.

On climbs, the Super Deluxe Ultimate RC2T shock has a partial lockout lever that calms pedal bob on the long DFCI fire roads of the Espinouse. The 30-tooth chainring and 52-tooth sprocket give a very low gear that lets you stay seated, rear wheel planted, when the gradient exceeds 15%.

Which Fuel should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel EX 9 Eagle 90	Alpha NEXT Platinum alloy	145 / 150 mm	SRAM Eagle 90 T-Type	16.58 kg
Fuel EX 9.8 Eagle 90	OCLV Mountain carbon	145 / 150 mm	SRAM Eagle 90 T-Type	not published
Fuel EX 9.8 XT	OCLV Mountain carbon	145 / 150 mm	Mechanical Shimano XT	15.28 kg
Fuel EX 9.9 X0 AXS	OCLV Mountain carbon	145 / 150 mm	Wireless SRAM X0 Eagle AXS	14.08 kg

Our take: for a climber, the gap between the 9.8 Eagle 90 and the 9.9 X0 AXS (14.08 kg in M) comes down mainly to the carbon wheels and drivetrain. The frame and suspension are the same; it is this foundation that determines efficiency on climbs.

LVR sizing advice

If you are between two sizes, the smaller makes the Fuel EX more playful in tight switchbacks, the larger more stable at high speed in rock gardens. The dropper post goes from 150 to 200 mm of travel depending on size, and size S runs a mixed 29 / 27.5 set-up.

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

Light enough for climbing?	The 3.31 kg carbon frame kit (M) is the best base; Trek does not publish the complete weight of this version.
What goes in the hatch?	An inner tube, tyre levers, tubeless plugs and a multi-tool fit in the down tube.
Shock lockout?	Yes, the Super Deluxe RC2T offers a firm position for smooth climbs.
Is the purple eye-catching?	It looks almost black in the shade and reveals its amethyst glints in full light.

The LVR Cycles verdict

A carbon trail bike built for days with lots of climbing, with low gearing and a frame that carries the essentials. The amethyst-marbled purple gives it an understated elegance.

Pros
+ Integrated storage for riding without a pack
+ Very low 30x52 gearing
+ Shimmering purple finish

Cons
- No official weight published
- Eagle 90 drivetrain heavier than X0

Why buy from LVR Cycles? In Béziers, we prepare your Fuel EX for long rides: tubeless set-up, shock set to your weight and route advice for the Caroux and the Espinouse.

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-5348892

Data sheet