Trek Rail+ 9.8 GX AXS T-Type Gen 5 - Dark Star/Lithium Marble

This trail-ready mountain e-bike delivers a perfect balance of performance and rugged utility, making it an excellent match for weekend trail exploration, multi-day bikepacking adventures, or a rock-solid daily driver. Equipped with a premium Fox Factory 38 suspension fork to absorb bumps and trail chatter, this model features an advanced OCLV Mountain Carbon frame with trail-smoothing Active Braking Pivot (ABP) technology and Mino Link adjustable geometry, a crisp-shifting 12-speed Shimano XT Di2 electronic drivetrain, a seamless and ultra-quiet Bosch smart drive system, and a factory-spec Bontrager Line Dropper post for instant on-the-fly saddle adjustments.

Specifications

Frameset & Suspension

• Frame: OCLV Mountain Carbon main frame, Removable Integrated Battery (RIB 2.0) system architecture, tapered head tube, guided internal cable routing, integrated Motor Armor shielding, angle-adjust headset, Mino Link adjustable geometry chip, adjustable leverage rate, 34.9 mm seat tube, Active Braking Pivot (ABP), UDH (Universal Derailleur Hanger), Boost148 spacing, 12 mm thru axle, 160 mm travel capacity format.

• Fork: Fox Factory 38, Float EVOL air spring, GRIP X2 damper, 44 mm offset, Boost110 spacing, 15 mm Kabolt X axle, 160 mm travel.

• Rear Shock: Fox Factory Float X, 2-position damper (205 mm x 65 mm).

E-System Integration

• Motor: Bosch Performance Line CX, high-torque smart system output (Regional assistance limits: Europe and APAC up to 25 km/h, US and ROW up to 20 mph / 32 km/h).

• Battery: Bosch PowerTube 800 Wh, integrated smart system frame pack.

• Display / Computer: Bosch Kiox 400C premium layout with mini handlebar remote unit.

• Charger: Bosch standard 4A, 230V smart system wall charger.

• E-bike Classification: Class 1.

Drivetrain & Shifting (Shimano XT Di2 1x12 Electronic)

• Shifter: Shimano XT Di2 M8250, 12-speed electronic.

• Front Derailleur: N/A (1x Dedicated single-ring drivetrain layout).

• Rear Derailleur: Shimano XT Di2 M8260, 12-speed electronic.

• Cassette: Shimano XT M8200, 10-51, 12-speed wide-range.

• Chain: Shimano XT M8100, 12-speed.

• Pedals: VP-536 nylon platform bodies.

• Crankset Configurations (Ethirteen Espec Plus arm setup):

  • All Sizes: Dedicated 160 mm arm length.

• Max Chainring Limits: 1x configuration: Maximum 36T | 2x configuration: N/A | 3x configuration: N/A.

Brakes & Rotors

• Brakes: Shimano XT M8220 4-piston hydraulic disc system.

• Rotors: Shimano RT-6B750, 6-bolt hub interface ([Front] 220 mm / [Rear] 200 mm configurations).

• Rotor Size Limits: Frame maximum capacity is 220 mm | Fork capacity: See specific fork manufacturer guidelines.

Wheels & Tyres

• Wheelset System (Bontrager Line Comp 30, Tubeless Ready, robust 6-bolt disc interface):

  • Front Configuration (Size S): 27.5" wheel size format, Boost110, 15 mm thru-axle.

  • Front Configuration (Sizes M, L, XL): 29" wheel size format, Boost110, 15 mm thru-axle.

  • Rear Configuration (All Sizes): 27.5" wheel size format, Rapid Drive 108 engagement system, Shimano Micro Spline freehub body, Boost148, 12 mm thru-axle.

• Rear Thru-Axle Skewer: Bontrager Switch thru axle, with integrated removable lever mechanism.

• Tyres standard by Size (Tubeless Ready, high-traction compounds):

  • Size S: Maxxis Minion DHR II, 3C compound, Double Down casing, MAXXGRIP, 27.5x2.5".

  • Sizes M, L, XL: Maxxis Assegai, 3C compound, EXO+ casing, MAXXGRIP, folding bead, 29x2.5".

• Included Tubeless Spares: Bontrager TLR rim strips and Bontrager TLR sealant (180 ml / 6 oz).

• Max Tyre Clearance: Frame limits at 27.5x2.60" | Fork clearance: See specific fork manufacturer guidelines.

Cockpit & Components

• Saddle: Verse Short Comp, steel rails, 145 mm width.

• Handlebar Tape / Grips: Trek Line Elite, lock-on system.

• Headset: Integrated cartridge bearing, 1-1/8'' top, 1.5'' bottom, angle adjust cup compatible.

• Dropper Seatpost Integration (Bontrager Line Dropper internal dropper system, MaxFlow technology, 34.9 mm diameter):

  • Size S: 150 mm travel layout (410 mm total length).

  • Size M: 170 mm travel layout (450 mm total length).

  • Sizes L, XL: 200 mm travel layout (515 mm total length).

• Handlebars standard by Size (Race Face Aeffect alloy):

  • All Sizes: 35 mm clamp area, aggressive 40 mm rise, ultra-stable 800 mm width.

• Stem Geometry by Size (Bontrager Elite alloy, 35 mm clamp, 0-degree rise):

  • All Sizes: 45 mm length.

Sizing, Weight & Performance Limits

• Alpha Sizes Available: S, M, L, XL.

• Total Bike Weight: 23.98 kg / 52.87 lbs (Size M configuration setup with factory TLR sealant, no inner tubes).

• Weight Limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lbs).

Included Accessories

• Mud Protection System: Trek custom integrated frame mudguard.

Please Note: We make every effort to ensure the accuracy of the specification information, but components are subject to change by the manufacturer at any time without prior notice due to ongoing factory running parts substitutions. Bike and frame weights are based on pre-production painted frames at time of publication; production variances may occur.