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The Trek Rail+ 9.8 GX AXS combines an OCLV Mountain carbon main frame, the Bosch Performance Line CX motor with its 800 Wh battery, a wireless SRAM GX Eagle AXS drivetrain and 160 mm Fox Performance Elite suspension. Trek quotes 24.18 kg in size M. Deep Smoke, a smoky charcoal grey, gives it a dark, understated look.
| Frame | OCLV Mountain carbon main frame, removable RIB 2.0 battery, Motor Armor, adjustable head angle, Mino Link, adjustable suspension leverage, UDH, Boost148 |
| Motor | Bosch Performance Line CX, 85 Nm (up to 100 Nm via the eBike Flow app), 250 W rated, assist up to 25 km/h |
| Battery | Integrated, removable Bosch PowerTube 800 Wh (RIB 2.0) |
| Controls / display | Bosch System Controller BRC3100, smart system |
| Suspension | Fox Performance Elite Float 38 GRIP X 160 mm / Fox Performance Elite Float X 205 x 65 mm, 160 mm |
| Drivetrain | Wireless SRAM GX Eagle AXS T-Type 1x12, GX 160 mm cranks, XS-1275 10-52 cassette |
| Brakes | SRAM Maven Bronze 4-piston hydraulic, HS2 200 and 220 mm rotors |
| Wheels / tyres | Bontrager Line Comp 30 / Brevard RSL SE 29 x 2.50 front, 27.5 x 2.50 rear |
| Cockpit | Bontrager Line Pro carbon 780 mm handlebar, Line Pro 45 mm stem |
| Saddle / seatpost | Verse Short Comp / Line Dropper 170 mm (M) or 200 mm (XL) |
| Weight | 24.18 kg in size M (Trek figure, with tubeless sealant) |
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At a glance
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For the tech-loving mountain biker who enjoys electronic controls and wants crisp gear changes, even mid-climb under the motor's push. It also suits anyone who is tired of adjusting cables and wants a drivetrain that stays spot on ride after ride.
OCLV Mountain carbon, wireless edition. The Rail+ 9.8 GX AXS keeps the 5th-generation OCLV Mountain main frame and fits it with a radio-controlled SRAM derailleur: no more housing rubbing inside the frame, a drivetrain mounted on the UDH hanger and identical shifting whatever the cable tension. With the 800 Wh battery, carbon remains the best base for keeping the bike at 24.18 kg in M.
| Carbon Rail+ (9.7 / 9.8) | Aluminium Rail+ (5 / 8) | Carbon Slash+ (TQ) | |
| Frame | OCLV Mountain main frame | Alpha Platinum | OCLV Mountain |
| Drive system | Bosch CX, PowerTube 800 Wh | Bosch CX, PowerTube 800 Wh | TQ HPR60, 580 Wh |
| Weight (M) | 23.73 to 24.18 kg | 24.78 to 25.08 kg | 21.58 to 21.83 kg |
| What it means | Lighter chassis, same motor | Gentler budget, robust frame | Gentler assist, livelier bike |
Put simply: a carbon Rail+ with Fox Performance Elite suspension, Maven brakes and a GX AXS derailleur, for the mountain biker who wants the convenience of wireless.
The GX AXS T-Type derailleur mounts directly to the UDH hanger and receives its commands by radio: no housing ages inside the frame, and precision no longer depends on cable tension. With the torque of the Bosch CX, this drivetrain copes with shifting under load better than a conventional setup.
The Fox 38 Performance Elite fork and its GRIP X damper allow separate adjustment of compression and rebound, and the Float X shock stays effective on the long descents of the Montagne Noire. The assist fades away above 25 km/h, as European rules require for 250 W rated.
| Model | Motor / battery | Rear / front travel | Drivetrain | Weight (M) |
| Rail+ 9.7 XT | Bosch CX / 800 Wh | 160 / 160 mm | Shimano XT / SLX 12-speed | 23.73 kg |
| Rail+ 9.8 GX AXS | Bosch CX / 800 Wh | 160 / 160 mm | Wireless SRAM GX AXS | 24.18 kg |
| Rail+ 9.8 XT Di2 | Bosch CX / 800 Wh | 160 / 160 mm | Wireless Shimano XT Di2 | 23.98 kg |
| Slash+ 9.9 | TQ HPR60 / 580 Wh | 170 mm fork | Wireless SRAM X0 AXS | 21.83 kg |
Our take: at 24.18 kg in M, this Rail+ 9.8 GX AXS weighs 450 g more than the Rail+ 9.7 XT (23.73 kg), but gains Fox Performance Elite, Maven brakes and wireless shifting. The Rail+ 9.8 XT Di2, with Fox Factory, drops to 23.98 kg.
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LVR sizing advice This model is available in M and XL. The dropper goes from 170 to 200 mm between the two; if you are around 180 cm tall, come and compare in store, as L is not offered in this colourway.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| Does the AXS derailleur need charging? | Yes, like any wireless SRAM AXS derailleur; we show you how to charge it when we hand the bike over. |
| What's the difference with the 9.8 XT Di2? | The XT Di2 moves to Fox Factory and an electronic Shimano drivetrain, for 200 g less. |
| Which sizes for this colourway? | M (165-177 cm) and XL (188-195 cm). |
| Is the smoky grey matt? | It is a dark, discreet charcoal that hides dust marks well. |
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The LVR Cycles verdict A modern carbon Rail+, with a wireless drivetrain and highly adjustable Fox suspension. Its smoky charcoal grey underlines its technical side.
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Why buy from LVR Cycles? As a Trek retailer in Béziers, we pair the AXS drivetrain, update the Bosch motor and set up the Fox suspension on your Rail+ for your weight.
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
Carbon full-suspension electric mountain bike Trek Rail+ 9.8 GX AXS: Bosch CX 800 Wh, Fox 160/160 mm, 24.18 kg
