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From S to XXL, the Trek Fuel+ MX 9.9 X0 AXS matches its Fox Transfer NEO dropper post to the size, from 150 to 200 mm, and gets an 800 mm Race Face ERA carbon handlebar, a 40 mm Turbine R stem and a Trek Aeolus Pro saddle with carbon rails. It keeps the series' TQ HPR60 motor, 580 Wh battery and OCLV Mountain carbon frame. Trek has not published a weight for this version, with the 9.8 XT Di2 on the same frame serving as a benchmark at 19.79 kg in size M. The Lichen Green/Keswick Green Splatter mixes a soft lichen green with Keswick green splashes.
| Frame | OCLV Mountain carbon, removable battery, adjustable head angle and progression, ABP, UDH, Boost |
| Motor | TQ HPR60: 60 Nm, 250 W continuous, 350 W peak |
| Battery | TQ 580 Wh, removable |
| Controls / display | TQ colour LED display, Bluetooth and connectivity |
| Suspension | RockShox ZEB Ultimate Charger 3.2 RC2 with ButterCups 170 mm / RockShox Vivid Ultimate 205 x 65 mm, 150 mm |
| Drivetrain | SRAM X0 Eagle AXS T-Type wireless 1x12, XS-1295 10-52 cassette, X0 Eagle T-Type chain, SRAM cranks |
| Brakes | SRAM Maven Silver 4-piston hydraulic, SRAM HS2 200 mm rotors |
| Wheels / tyres | Bontrager Line Pro 30 carbon, mixed-wheel setup / Maxxis Assegai 29 x 2.5 MaxxGrip EXO+ (front) and Minion DHR II 27.5 x 2.5 MaxxGrip Double Down (rear), 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 carbon rails 145 mm / Fox Transfer NEO, 150 to 200 mm depending on size |
| Weight | Not published by Trek for this version; benchmark MX 9.8 XT Di2 (same frame, same motor): 19.79 kg in M |
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At a glance
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For mountain bikers of all sizes, from smaller riders of 155 cm to tall riders of 203 cm, who want a bike fitted to their body and a refined connection with the machine.
OCLV carbon, Trek's signature. OCLV is Trek's long-standing carbon know-how: moulding under pressure and heat that expels the air trapped between the plies and gives a dense, uniform material. For its mountain bikes, Trek offers it as OCLV Mountain, with reinforcements in the areas exposed to rocks and crashes. The Fuel+ MX 9.9 X0 AXS pairs this frame, covered by a lifetime warranty, with carbon wheels and a carbon cockpit, the most accomplished build in the MX series.
| Fuel+ (TQ HPR60) | Fuel EXe (TQ HPR50) | Rail+ (Bosch CX) | |
| Assist | 60 Nm, 350 W peak | 50 Nm | Bosch Performance Line CX |
| Battery | 580 Wh | 360 Wh | 800 Wh |
| Benchmark weight (M) | 19.79 kg (MX 9.8 XT Di2) | 18.68 kg (EXe 9.9 XX AXS) | 23.98 kg (Rail+ 9.8) |
| Philosophy | Lightweight e-MTB, comfortable reserve | The most natural, shorter range | Power and a big battery |
Put simply: the 9.9 X0 AXS is the best-equipped Fuel+ MX: Line Pro 30 carbon wheels, carbon handlebar, wireless derailleur, 170 mm RockShox ZEB Ultimate fork and Vivid Ultimate shock. Trek does not publish its weight; the closest benchmark remains the 9.8 XT Di2 at 19.79 kg in M.
The Fox Transfer NEO dropper offers 150 mm in S, 175 mm in M and 200 mm from L upwards: a saddle that drops right out of the way frees up the rider's movement on steep descents. We check the insertion based on your inside leg.
The 800 mm wide ERA carbon handlebar can be cut down to your shoulder width, and the short 40 mm stem gives sharp steering. The Aeolus Pro saddle with carbon rails combines lightness and support for long assisted climbs. The assist, for its part, stops at 25 km/h, with 250 W nominal, as on any European e-bike.
| Model | Motor / battery | Rear / front travel | Drivetrain | Weight (M) |
| Fuel+ EX 9.9 X0 AXS | TQ HPR60, 580 Wh | 145 / 150 mm | Wireless SRAM X0 Eagle AXS | not disclosed |
| Fuel+ MX 9.8 XT Di2 | TQ HPR60, 580 Wh | 150 / 160 mm | Wireless Shimano XT Di2 | 19.79 kg |
| Fuel+ MX 9.9 X0 AXS | TQ HPR60, 580 Wh | 150 / 170 mm | Wireless SRAM X0 Eagle AXS | not disclosed |
| Fuel+ LX 9.8 Eagle 90 | TQ HPR60, 580 Wh | 160 / 170 mm | SRAM Eagle 90 T-Type | 20.88 kg |
Our take: in every size, the 9.9 X0 AXS keeps the RockShox suspension of the 9.8 Eagle 90; it stands apart with its carbon cockpit, Fox dropper, Line Pro 30 wheels and wireless drivetrain. The 9.8 XT Di2 (19.79 kg in M) remains the Fuel+ MX with a published weight.
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LVR sizing advice Between two sizes, the more compact one suits riders who like to play with the terrain, the larger one those looking for stability at high speed. The Fox Transfer NEO dropper goes from 150 mm in S to 175 mm in M and 200 mm from L upwards.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| Which size for 1.80 m? | The L covers 177 to 188 cm; we confirm it in store based on your inside leg. |
| How much travel does the Fox dropper have? | It depends on the frame size: 150, 175 or 200 mm. |
| Can the handlebar be shortened? | Yes, the Race Face ERA carbon bar can be cut down in the workshop with the proper tools. |
| Is the lichen green a solid colour? | No, it is scattered with splashes of a richer Keswick green. |
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The LVR Cycles verdict A high-end Fuel+ MX that looks after the rider as much as the mechanics, with a carbon cockpit and a dropper matched to every size. Its speckled lichen green makes it instantly recognisable.
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Why buy from LVR Cycles? As a Trek dealer in Béziers, we help you choose your size, cut the handlebar to your width and adjust the dropper and suspension to your body.
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