Why buy your bike from Sigma Sports?
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Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
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Trek Rail 9.8 GX AXS Gen 4 Electric Mountain Bike
Discover the ultimate long-travel carbon e-MTB boasting wireless electronic shifting and a potent battery. Benefit from an upgraded OCLV Mountain Carbon frame, featuring extended reach and robust head tube and seat tube for unparalleled durability. Experience enhanced performance with a long-range 750 Wh battery, responsive RockShox ZEB Select+ fork, and RockShox Super Deluxe Ultimate Thru Shaft shock. Enjoy the precision of SRAM GX AXS wireless electronic shifting alongside the latest Bosch smart system, including the Performance Line CX motor and integrated Bluetooth® System Controller. With a focus on versatility, this bike excels in both descents and climbs, powered by its potent Bosch motor and 750 Wh battery. Seamlessly toggle between assist levels with the compact Mini Remote, integrated neatly into the top tube. The intelligent eMTB modes adjust assist levels dynamically, providing optimal power for any terrain. A robust frame design accommodates stout components for enhanced performance and stability, while Trek's Removable Integrated Battery (RIB) system ensures convenience and protection, seamlessly integrating the battery into the frame. Experience the epitome of e-MTB performance with this meticulously crafted ride.
Technical Specification
| Frame | OCLV Mountain Carbon main frame, 1.8'' lower head tube, Bosch System Controller-compatible, Removable Integrated Battery (RIB), Knock Block 2.0, guided internal routing, 34.9 mm seat tube, magnesium rocker link, Motor Armour, Mino Link, ABP, Boost148, 12 mm thru-axle, 150 mm travel |
| Fork | RockShox ZEB Select+, DebonAir spring, Charger 3 RC2 damper, 1.8" oversized tapered steerer, eMTB optimised crown, 44 mm offset, Boost110, 15 mm Maxle Stealth, 160 mm travel |
| Shock | RockShox Super Deluxe Select+ RT, 230 mm x 57.5 mm |
| Max compatible fork travel | 170mm (580mm axle-to-crown) |
| Wheel front | Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15 mm thru axle, 29" |
| Wheel rear | Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12 mm thru axle, 29" |
| Skewer rear | Bontrager Switch thru-axle, removable lever |
| Tyre Size | S, M, L, XL Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50" |
| Tyre part | Bontrager TLR sealant, 180 ml/6 oz |
| Rim strip | Bontrager TLR |
| Max tyre size | Frame |
| Battery Size | S |
| Size | M, L, XL Bosch PowerTube 750Wh, smart system |
| Charger | Bosch standard 4A, 230V, smart system |
| Controller Size | S, M, L, XL |
| Size | S, M, L, XL Bosch Mini Remote BRC3300, smart system, 22.2 mm |
| Motor | Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm |
| Shifter | SRAM GX Eagle AXS, 12 speed |
| Rear derailleur | SRAM GX Eagle AXS |
| Crank | SRAM X1 1000, 34T, 165 mm length |
| Chainring | SRAM X-SYNC 2, 34T, alloy |
| Cassette | SRAM Eagle XG-1275, 10-52, 12-speed |
| Chain | SRAM GX Eagle, 12-speed |
| Pedal | VP-536 nylon platform |
| Max. chainring size | 1x |
| Saddle | Bontrager Arvada, austenite rails, 138 mm width |
| Seatpost Size | S Bontrager Line Elite Dropper, 100 mm travel, MaxFlow, internal routing, 34.9 mm, 345 mm length |
| Size | M Bontrager Line Elite Dropper, 150 mm travel, MaxFlow, internal routing, 34.9 mm, 440 mm length |
| Size | L Bontrager Line Elite Dropper, 170 mm travel, MaxFlow, internal routing, 34.9 mm, 485 mm length |
| Size | XL Bontrager Line Elite Dropper, 200 mm travel, MaxFlow, internal routing, 34.9 mm, 550 mm length |
| Handlebar | Bontrager Line Pro, OCLV Carbon, 35 mm, 27.5 mm rise, 780 mm width |
| Grips | Bontrager XR Trail Elite, nylon lock-on |
| Stem | Bontrager Line Pro, 35 mm, Blendr-compatible, 0-degree, 45 mm length |
| Brake rotor Size | S, M, L, XL SRAM CenterLine, 6-bolt, round-edge, 180mm |
| Size | S, M, L, XL SRAM CentreLine, 6-bolt, round edge, 200 mm |
| Size | S, M, L, XL SRAM 6-bolt, 200 mm |
| Size | S, M, L, XL SRAM HS2, 6-bolt, 220mm |
| Brake Set | SRAM Code R 4-piston hydraulic disc |
| Rotor size | Max brake rotor sizes - Frame |
| Electronics | SRAM AXS aux power cable |
| Weight | M - 23.90 kg / 52.7 lbs |
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lbs). |
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride. For hassle-free home delivery and bike set-up from a qualified mechanic use our Premier Delivery Service.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.
Trek Rail 9.8 GX AXS Gen 4 Electric Mountain Bike Sizing
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