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The top of the family, the Trek Fuel EX 9.9 X0 AXS Gen 7 weighs 14.08 kg in size M with its OCLV Mountain carbon frame, Bontrager Line Pro 30 carbon wheels and wireless SRAM X0 Eagle AXS T-Type drivetrain. The RockShox Ultimate suspension offers 145 mm at the rear and 150 mm at the front. The Miami Green/Aloha Marble colourway dresses it in a deep teal marbled with light green.
| 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 | Wireless SRAM X0 Eagle AXS T-Type 1x12, 30T chainring, XS-1295 10-52 cassette, X0 Eagle chain |
| Brakes | SRAM Maven Silver hydraulic 4-piston, HS2 rotors 200 mm (front) and 180 mm (rear) |
| Wheels / tyres | Bontrager Line Pro 30 carbon / Maxxis Minion DHF (front) and DHR II (rear) 2.5, EXO+, Tubeless Ready |
| Cockpit | Race Face ERA carbon 800 mm handlebar, 27.5 mm rise, Race Face Turbine R 40 mm stem |
| Saddle / seatpost | Trek Aeolus Pro with carbon rails, 145 mm / wireless RockShox Reverb AXS, 150 to 200 mm depending on size |
| Weight | 14.08 kg in size M (Trek figure, with tubeless sealant) |
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At a glance
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For the experienced mountain biker who wants the best of the Fuel EX platform and rides enough to make the most of every upgrade: carbon wheels, fully wireless, highly adjustable suspension. It will suit the rider who wants a single high-end bike for all their trail rides.
OCLV carbon, Trek's signature. Since 1992, Trek has cured its fibres under pressure for void-free frames. The Mountain version reinforces the areas hit by rocks and landings. Frameset: 3.31 kg (M), with lifetime warranty.
| OCLV Mountain (Fuel EX 9.8 / 9.9) | Alpha NEXT Platinum (Fuel EX 5 to 9) | Road OCLV (Madone, Domane) | |
| Level | MTB carbon, alloy frame rocker | Trek premium aluminium | Trek road carbon |
| Construction | OCLV reinforced in exposed areas | Hydroforming, smoothed welds | OCLV lightened to the maximum |
| Fuel EX frameset (M) | 3.31 kg | 4.95 kg | not applicable |
| What it means | Base of the lightest Fuel EX | 1.64 kg more on the frame | Not made for MTB impacts |
Put simply: same frame as the 9.8 models; the 1.20 kg saving over the 9.8 XT comes down to the kit.
The SRAM X0 Eagle AXS T-Type drivetrain mounts directly on the wheel axle via the UDH hanger: no more bent derailleur hangers, and a derailleur designed to withstand knocks against rocks. Cable-free shifting stays perfectly consistent, even in the dust of the garrigue.
For stopping, the Maven Silver brakes bite hard with a single finger, and their reach can be adjusted for smaller hands. On the fast slopes around Lodève, you can brake later while keeping fine control.
| Model | Frame | Travel rear / front | Drivetrain | Weight (M) |
| 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 |
| Top Fuel 9.8 XT Di2 | OCLV Mountain carbon | 120 / 130 mm | Wireless Shimano XT Di2 | 14.00 kg |
| Fuel LX 9.8 XT Di2 | OCLV Mountain carbon | 160 / 170 mm | Wireless Shimano XT Di2 | 15.97 kg |
Our take: the 9.9 X0 AXS is 1.20 kg lighter than the 9.8 XT, thanks to its spec. For more travel, the Fuel LX 9.8 XT Di2 moves up to 160 / 170 mm for 15.97 kg in M.
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LVR sizing advice If you are between two sizes, the smaller favours handling on technical trails, the larger composure when the terrain speeds up. The Reverb AXS goes from 150 mm in S to 200 mm from L, and size S uses a 27.5-inch rear wheel.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| Are the Maven brakes powerful? | Very; the Silver version also lets you adjust the lever reach. |
| Is the T-Type derailleur strong? | Yes, it mounts on the UDH hanger and resists impacts better. |
| How many batteries? | Those of the derailleur and Reverb AXS post, plus the coin cells in the shifters. |
| Is the marbling unique? | The pattern may vary slightly from one frame to another; that is the nature of a marbled finish. |
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The LVR Cycles verdict The most accomplished Fuel EX, light at 14.08 kg in M and specced without any compromise. The teal marbled with light green suits this top-end model well.
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Why buy from LVR Cycles? As a Trek dealer in Béziers, we pair your AXS drivetrain, bleed the Maven brakes and service your RockShox suspension.
Please note that the specifications may be changed without prior notice by the manufacturer, based on the availability of components and other factors.
Data sheet
Specific References