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Carbon full-suspension mountain bike Trek Fuel EX 9.9 X0 AXS deep smoke 12-speed

Carbon full-suspension mountain bike Trek Fuel EX 9.9 X0 AXS smoky grey: X0 T-Type, Reverb AXS, 14.78 kg

€8,429.00 Incl. Tax

~~€9,499.00~~ MSRP

-11%

Recommended supplier selling price in 2026

Color

Black

Size

Size charts

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Description
Product Details

Trek Fuel EX 9.9 X0 AXS Deep Smoke: wireless carbon trail riding

The Gen 6 Trek Fuel EX 9.9 X0 AXS T-Type combines an OCLV Mountain carbon frame, the SRAM X0 Eagle AXS T-Type wireless drivetrain and the radio-controlled Reverb AXS dropper post, weighing 14.78 kg in size M. Trek's spec for this size S lists 140 mm of travel front and rear, with 27.5-inch wheels. The Deep Smoke colour dresses the frame in a very dark smoked grey, understated and technical.

Technical specifications

Frame	OCLV Mountain carbon, internal storage, Mino Link, adjustable leverage ratio, adjustable head angle headset, ABP, BSA 73 bottom bracket, ISCG 05, UDH hanger
Suspension	Fox Factory 36 GRIP X2, 140 mm (Trek spec, size S) / Fox Factory Float X 185x55 mm, 140 mm
Drivetrain	Wireless SRAM X0 Eagle AXS T-Type 1x12, XS-1295 10-52 cassette, 30T chainring
Brakes	SRAM Maven Silver 4-piston, HS2 180 mm rotors
Wheels / tyres	Bontrager Line Pro 30 / SE5 Team Issue 27.5x2.50 Tubeless Ready (size S)
Cockpit	Bontrager Line Pro carbon 780 mm handlebar, Line Pro 35 mm stem
Saddle / seatpost	Verse Short Pro carbon rails / wireless RockShox Reverb AXS 100 mm (size S)
Weight	14.78 kg in size M (Trek figure, with tubeless sealant)

At a glance

✓ OCLV Mountain carbon	✓ SRAM X0 AXS T-Type
✓ Wireless Reverb AXS post	✓ SRAM Maven brakes
✓ Fox Factory GRIP X2	✓ 14.78 kg in size M

Who is it for?

For the smaller rider who wants a high-end carbon trail bike proportioned to their build, and who appreciates a clean cockpit with no derailleur or dropper cables. Ideal for riding varied trails, from committed rides to technical weekend descents.

The LVR workshop view

OCLV Mountain carbon, the all-electronic version. This Fuel EX 9.9 pairs the Gen 6 OCLV Mountain carbon frame with SRAM's wireless ecosystem: an X0 AXS T-Type rear derailleur mounted directly on the UDH hanger and a radio-controlled Reverb AXS post. The mountain bike carbon layup is designed to resist rock strikes, and the frame keeps its storage hatch and adjustable head angle headset. Trek lifetime warranty on the frame.

	OCLV Mountain	Alpha Platinum (Gen 6)	Alpha NEXT Platinum (Gen 7)
Level	Trek's mountain bike carbon	High-end aluminium	Trek's most refined aluminium
Construction	OCLV layup reinforced against impacts	Hydroformed tubes, smoothed welds	Refined tube shapes
Reference bike	Gen 7 Fuel EX frameset: 3.31 kg (M)	Gen 6 Fuel EX 5 / 8	Gen 7 Fuel EX frameset: 4.95 kg (M)
What it means	About 1.6 kg less on the frameset	Proven, robust base	Alloy version of the new generation

Put simply: this build is not the lightest (14.78 kg versus 13.98 kg for the XTR version), but it is the most modern: no more derailleur or dropper cables to adjust, and Maven brakes built for long descents.

The T-Type drivetrain mounts directly on the UDH hanger, with no intermediate derailleur hanger: it copes much better with a knock against a rock and keeps its adjustment. On the rocky trails around Béziers, where derailleurs suffer, that is real peace of mind.

The four-piston SRAM Maven Silver brakes offer high power with a progressive bite: on a long descent in the Montagne Noire, your fingers tire less. We bleed the system and check the calliper bolts at handover, then at every service.

Which Fuel EX should you choose?

Model	Frame	Travel rear / front	Drivetrain	Weight (M)
Fuel EX 8 GX AXS (Gen 6)	Alpha Platinum alloy	140 / 150 mm	SRAM GX AXS T-Type 1x12	15.88 kg
Fuel EX 9.9 X0 AXS (Gen 6)	OCLV Mountain carbon	140 / 140 mm (size S page)	SRAM X0 AXS T-Type 1x12	14.78 kg
Fuel EX 9.9 XTR (Gen 6)	OCLV Mountain carbon	140 / 150 mm	Shimano XTR 1x12	13.98 kg
Fuel EX 9.8 XT (Gen 7)	OCLV Mountain carbon	145 / 150 mm	Shimano XT 1x12	15.28 kg

Our take: compared with the 9.9 XTR, this build weighs 800 g more, but brings wireless electronics and the Reverb AXS. The Fuel EX 8 GX AXS offers wireless shifting in aluminium for an extra 1.1 kg.

LVR sizing advice

Offered here in size S (155 to 165 cm), with 27.5-inch wheels, better proportioned for smaller riders. Above 165 cm, look at another Fuel EX; we check your position in store.

Size	S
Rider height (cm)	155-165
Inseam (cm)	74-78
Wheels (inches)	27.5
Dropper post (mm)	100

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

Your questions

What does T-Type mean?	A SRAM derailleur mounted directly on the frame's UDH hanger, tougher and with no hanger to replace.
Frequent charging?	The AXS batteries in the derailleur and post are charged from time to time with the charger.
Why 27.5 wheels?	In size S, Trek fits 27.5-inch wheels, which are more agile and better suited to smaller riders.
Does Deep Smoke scratch?	Protective film on the down tube limits marks; we can fit it in the workshop.

The LVR Cycles verdict

A modern carbon trail bike, designed here for smaller riders, that gets the best out of SRAM wireless. The Deep Smoke grey suits it well: discreet, it lets the technology do the talking.

Pros
+ Very tough T-Type drivetrain
+ Cable-free Reverb AXS post
+ 27.5 wheels suited to size S

Cons
- 800 g more than the XTR version
- Batteries to keep an eye on

Why buy from LVR Cycles? In Béziers, we pair your AXS drivetrain, set up the Reverb and suspension for your weight and explain charging when we hand over your Fuel EX.

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-5330180

Data sheet