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Built for rides of several hours in the mountains, the Trek Rail+ 9.8 XT Di2 pairs an 800 Wh Bosch PowerTube battery with the Performance Line CX motor, on an OCLV Mountain carbon main frame with 160 mm of travel. Its Shimano XT Di2 drivetrain and four-piston XT brakes complete a package weighing 23.98 kg in size M according to Trek. Fury Red/Dark Star contrasts an intense red with a deep black.
| 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, 250 W rated, assist up to 25 km/h |
| Battery | Integrated, removable Bosch PowerTube 800 Wh (RIB 2.0) |
| Suspension | Fox Factory 38 GRIP X2 160 mm / Fox Factory Float X 205 x 65 mm, 160 mm |
| Drivetrain | Wireless Shimano XT Di2 M8260 12-speed, XT M8200 10-51 cassette, XT chain |
| Brakes | Shimano XT M8220 4-piston hydraulic, RT-6B750 200 and 220 mm rotors |
| Wheels / tyres | Bontrager alloy hubs, Rapid Drive 108 freehub |
| Cockpit | 35 mm handlebar, Bontrager Elite 45 mm stem, Trek Line Elite grips |
| Saddle / seatpost | Verse Short Comp / Line Dropper 150 to 200 mm depending on size |
| Weight | 23.98 kg in size M (Trek figure, with tubeless sealant) |
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At a glance
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For the adventurous mountain biker who strings together big loops, links between ranges and descents at the end of the day, when fatigue makes reliable kit essential. It also suits riders heading out on day-long touring rides.
OCLV carbon, at the top of the Rail+ range. This 9.8 XT Di2 uses the 5th-generation OCLV Mountain main frame, compacted under heat for high stiffness and controlled weight, and pairs it with Fox Factory suspension, the most adjustable in the range. Despite the 800 Wh battery, the whole bike stays at 23.98 kg in M; the frame carries Trek's lifetime warranty.
| 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: the Rail+ 9.8 XT Di2 is the most accomplished in the series, with Fox Factory, an electronic Shimano drivetrain and XT brakes; it weighs 200 g less than the 9.8 GX AXS.
The 800 Wh battery offers a generous reserve for long days, provided you match the mode to the gradient; the Bosch CX's eMTB mode does this for you by metering the assist according to your effort. The assist stops at 25 km/h, the European limit for 250 W rated. The battery comes out of the frame so you can charge it at your gîte.
Shimano XT Di2 shifts gears with no cable to tension and stays precise ride after ride, even when the mud gets in. The XT M8220 brakes and their 200 and 220 mm rotors keep their bite after a long descent towards the Orb valleys, where fatigue makes every braking point more important.
| Model | Motor / battery | Rear / front travel | Drivetrain | Weight (M) |
| Rail+ 9.7 Eagle 70 | Bosch CX / 800 Wh | 160 / 160 mm | SRAM Eagle 70 12-speed | 23.88 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 23.98 kg in M, this 9.8 XT Di2 is only 250 g heavier than the Rail+ 9.7 XT (23.73 kg) while offering Fox Factory and an electronic drivetrain. The Rail+ 9.7 Eagle 70 weighs 23.88 kg.
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LVR sizing advice Four sizes from S to XL; the dropper grows with the frame, from 150 mm in S to 200 mm in L and XL. Torn between two sizes? The smaller one makes this 24 kg bike easier to place, the larger one more composed at high speed.
Source: Trek size guide. Bike fitting available in our Béziers shop. |
| How much climbing can I do with 800 Wh? | It depends on weight, terrain and mode; we help you make the best use of the modes. |
| Can the battery be charged off the bike? | Yes, the PowerTube comes out thanks to the RIB 2.0 system. |
| Do the XT brakes go the distance? | Yes, four pistons and 200 and 220 mm rotors, sized for an e-MTB. |
| Is Fury Red bright? | Yes, a bold, vivid red, set off by Dark Star black. |
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The LVR Cycles verdict An enduring, reliable and precise carbon Rail+, designed for whole days in the mountains. Fury Red on black gives it a bold presence.
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Why buy from LVR Cycles? In Béziers, we prepare your Rail+ for big rides: Bosch update, Fox set-up, brake bleed and advice on battery management.
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