Trek Rail 9.8 GX AXS Gen 4
Details
Rail 9.8 GX AXS is a long-travel carbon e-MTB that rips like our beefiest trail rigs and powers you right back up the mountain. You get upgraded everything, including the frame for maximum fun on the gnarliest runs. Bosch's latest tech with smart system Performance Line CX has a longer-range 750Wh battery and cool features that take your ride to the next level like activity tracking, navigation, and Bluetooth connectivity. The new System Controller sits almost flush for a sleek look, and Mini Remote is discreet and intuitive.
It's right for you if...
You’re looking for a long-travel carbon e-MTB with wireless electronic shifting and a lot of battery power. You want the stability of a longer reach, the plush feel of high-end suspension, and the very latest e-bike tech with the new Bosch smart system.
The tech you get
An upgraded OCLV Mountain Carbon frame with longer reach and oversized head tube and seat tube for maximum strength. An extra-long-range 750Wh battery, a super responsive RockShox ZEB Select+ fork, and RockShox Super Deluxe Ultimate Thru Shaft shock. You get SRAM GX AXS wireless electronic shifting and the latest from Bosch with smart system Performance Line CX, including the new Bluetooth® System Controller that's integrated into the top tube and compact Mini Remote to change modes.
The final word
This bike features across-the-board upgrades that make it a serious ripper—especially the AXS drivetrain. It's built for hammering gnarly descents, then flying right back up again thanks to the powerful Bosch motor, 750Wh battery, and parts that can keep up with all that rowdy riding.
Why you'll love it
- The new System Controller shows your currently-selected assist level and remaining battery level. Its neatly integrated into the top tube for maximum protection and a sleek look.
- Bosch's new smart system gives you all the same power and responsiveness with a new discrete Mini Remote that's streamlined with just the controls you need at your fingertips to toggle through assist levels or change to walk mode
- Intelligent eMTB and eMTB Lite modes automatically adjust the assist based on your input to give you just the right amount of power for your ride
- The new frame is extra stout with a 34.9mm seat tube to accommodate more robust dropper posts, and an oversized head tube that works with burly e-MTB-optimized forks for less flex and more precise steering
- Trek's Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy remove the battery without tools and lets you mount a water bottle cage
| All measurements provided in cm unless otherwise noted. | ||||||||
|---|---|---|---|---|---|---|---|---|
| Frame size number | 15.5" | 15.5" | 17.5" | 17.5" | 19.5" | 19.5" | 21.5" | 21.5" |
| Frame size letter | Small | Small | Medium | Medium | Large | Large | X-Large | X-Large |
| Geometry position | High | Low | High | Low | High | Low | High | Low |
| Wheel size | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" |
| A — Seat tube | 41 | 41 | 42 | 42 | 45 | 45 | 50 | 50 |
| B — Seat tube angle | 71.2° | 70.8° | 71.2° | 70.8° | 71.2° | 70.8° | 71.2° | 70.8° |
| Effective seat tube angle | 77.1° | 76.7° | 77.1° | 76.7° | 77.1° | 76.7° | 77.1° | 76.7° |
| C — Head tube length | 10.5 | 10.5 | 11 | 11 | 12.5 | 12.5 | 14 | 14 |
| D — Head angle | 64.6° | 64.2° | 64.6° | 64.2° | 64.6° | 64.2° | 64.6° | 64.2° |
| E — Effective top tube | 57.9 | 58 | 60 | 60.1 | 63.8 | 63.9 | 67.1 | 67.3 |
| F — Bottom bracket height | 34.6 | 34.1 | 34.6 | 34.1 | 34.6 | 34.1 | 34.6 | 34.1 |
| G — Bottom bracket drop | 2.7 | 3.3 | 2.7 | 3.3 | 2.7 | 3.3 | 2.7 | 3.3 |
| H — Chainstay length | 44.7 | 44.8 | 44.7 | 44.8 | 44.7 | 44.8 | 44.7 | 44.8 |
| I — Offset | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 |
| J — Trail | 13 | 13.3 | 13 | 13.3 | 13 | 13.3 | 13 | 13.3 |
| K — Wheelbase | 121.3 | 121.4 | 123.6 | 123.6 | 127.7 | 127.8 | 131.3 | 131.4 |
| L — Standover | 76.1 | 75.6 | 77.3 | 76.8 | 77 | 76.5 | 76.8 | 76.3 |
| M — Frame reach | 43.6 | 43.2 | 45.6 | 45.2 | 49.1 | 48.7 | 52.1 | 51.7 |
| N — Frame stack | 62.5 | 62.8 | 62.9 | 63.3 | 64.3 | 64.6 | 65.6 | 66 |
| Size | Rider Height | Inseam |
|---|---|---|
| Small | 155 - 165 cm 5'1" - 5'5" |
74 - 78 cm 29" - 31" |
| Medium | 165 - 176 cm 5'5" - 5'9" |
79 - 83 cm 31" - 33" |
| Large | 177 - 188 cm 5'10" - 6'2" |
84 - 89 cm 33" - 35" |
| X-Large | 188 - 195 cm 6'2" - 6'5" |
89 - 91 cm 35" - 36" |
Specs
| 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, 34.9mm seat tube, magnesium rocker link, Motor Armor, Mino Link, ABP, Boost148, 12mm thru axle, 150mm travel |
|---|---|
| Fork | RockShox ZEB Select+, DebonAir spring, Charger 3 RC2 damper, 1.8'' oversized tapered steerer, eMTB optimized crown, 44mm offset, Boost110, 15mm Maxle Stealth, 160mm travel |
| Rear Shock | RockShox Super Deluxe Select+ RT, 230mm x 57.5mm |
| Wheels |
Front: Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle Rear: Bontrager Line Comp 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Boost148, 12mm thru axle |
| Rims | Bontrager Line Comp 30, Tubeless Ready, 28-hole, Presta valve |
| Hubs |
Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle Rear: Bontrager alloy, sealed bearing, 6-bolt, 108T Rapid Drive, SRAM XD driver, Boost148, 12mm thru axle |
| Tires |
Size: S, M, L, XL Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50'' Size: S, M, L, XL Bontrager SE6 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50" |
| Crankset | SRAM X1 1000, 34T, 165mm length |
| Chainrings | SRAM X-SYNC 2, 34T, alloy |
| Shifters | SRAM GX Eagle AXS, 12 speed |
| Rear Derailleur | SRAM GX Eagle AXS |
| Cassette/Freewheel | SRAM Eagle XG-1275, 10-52, 12 speed |
| Chain | SRAM GX Eagle, 12 speed |
| Brakes | SRAM Code R 4-piston hydraulic disc |
| Rotors |
Size: S, M, L, XL SRAM 6-bolt, 200mm Size: S, M, L, XL SRAM HS2, 6-bolt, 220mm |
| Handlebars | Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width |
| Tape/Grips | Bontrager XR Trail Elite, nylon lock-on |
| Stem | Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length |
| Seatpost |
Size: S Bontrager Line Elite Dropper, 100mm travel, MaxFlow, internal routing, 34.9mm, 345mm length Size: M Bontrager Line Elite Dropper, 150mm travel, MaxFlow, internal routing, 34.9mm, 440mm length Size: L Bontrager Line Elite Dropper, 170mm travel, MaxFlow, internal routing, 34.9mm, 485mm length Size: XL Bontrager Line Elite Dropper, 200mm travel, MaxFlow, internal routing, 34.9mm, 550mm length |
| Saddle | Bontrager Arvada, austenite rails, 138mm width |
| Pedals | Wellgo VPE-536 |
| Motor | Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm, 20 mph or 32 km/h max assist (25 km/h max assist in EU and APAC) |
| Battery |
Size: S Bosch PowerTube 625Wh, smart system Size: M, L, XL Bosch PowerTube 750Wh, smart system |
| Controller/Display |
Size: S, M, L, XL Bosch System Controller BRC3100, smart system Size: S, M, L, XL Bosch Mini Remote BRC3300, smart system, 22.2mm SRAM AXS aux power cable |
| Charger | Bosch standard 4A, 110V, smart system |
* Subject to change without notice.
Part Numbers
| Option | UPC | MPN | Store SKU |
|---|---|---|---|
| Satin Baja Yellow / Small | 768682724668 | 5278559 | RAI29465073W |
| Satin Baja Yellow / X-Large | 601479084708 | 5278562 | RAI3092628W |
| Deep Smoke / Small | 768682724804 | 5278551 | RAI23440832E |
| Deep Smoke / Large | 768682724569 | 5278553 | RAI23622896E |
| Deep Smoke / X-Large | 768682724743 | 5278554 | RAI24804981E |
| Lava / Small | 768682724880 | 5278555 | RAI18619879A |
| Lava / Medium | 768682724989 | 5278556 | RAI18648889A |
| Lava / X-Large | 768682724767 | 5278558 | RAI19314797A |