Trek Rail+ 9.9 X0 AXS T-Type Gen 5
Trek / Electric Mountain Bikes
More trail in every ride.
Rail+ 9.9 is our top carbon enduro e-MTB made for your most epic adventures. Its robust carbon frame packs 160mm of front and rear upgraded RockShox suspension and adjustable geometry you can tune to how and where you ride. It comes equipped with a Bosch CX Line motor that delivers serious torque for ripping up climbs and a huge 800Wh RIB 2.0 removable integrated battery. It's topped off with all the bells and whistles you want – like carbon wheels and a wireless SRAM X0 transmission.
Based on the bike's size chart. Your complimentary baseline fit in store dials in the rest.
Not currently available from Trek
Questions are welcome. No pressure, no bike jargon required.
The ride, not just the specs
Rail is an electric mountain bike for riders who want more: more laps, more climbing, and more time on the fun parts of the trail.
The motor helps you up so you have plenty left for the way down.
What makes it special
Bosch Performance Line CX sets the standard for eMTB performance with 85Nm of torque out of the box, but can be tuned all the way up to 120Nm and 750 watts of power using the Bosch eBike Flow app. The Bosch Smart system also has intelligent eMTB mode with Extended Boost that automatically adjusts the amount of assist based on the terrain. *O aplicativo eBike Flow não está disponível no Brasil.
Removable Integrated Battery (RIB 2.0) makes it easy to remove your battery for more convenient charging or traveling, and you don't have to worry about dropping it thanks to a secondary safety catch.
The compact, ergonomic Mini Remote lets you easily change assist level, activate Walk mode, or turn on optional lights, all without moving your hand off the handlebar. Plus, it's wireless and connects with your System Controller via Bluetooth
For the detail-oriented
Tap any group to see every part.
Measurements in cm unless noted.
| Size | S | S | M | M | L | L | XL | XL |
|---|---|---|---|---|---|---|---|---|
| Rider height | 5'1"–5'5" | 5'1"–5'5" | 5'5"–5'10" | 5'5"–5'10" | 5'10"–6'2" | 5'10"–6'2" | 6'2"–6'5" | 6'2"–6'5" |
| Seat tube (A on the drawing) | 38.0 | 38.0 | 41.0 | 41.0 | 43.5 | 43.5 | 47.0 | 47.0 |
| Seat tube angle (B on the drawing) | 74.8° | 74.8° | 74.8° | 74.8° | 74.8° | 74.8° | 74.8° | 74.8° |
| Head tube length (C on the drawing) | 10.0 | 10.0 | 10.0 | 10.0 | 12.0 | 12.0 | 14.5 | 14.5 |
| Head tube angle (D on the drawing) | 64.5° | 64.5° | 64.5° | 64.5° | 64.5° | 64.5° | 64.5° | 64.5° |
| Eff. top tube (E on the drawing) | 56.3 | 56.3 | 59.2 | 59.2 | 63.9 | 63.9 | 67.0 | 67.0 |
| BB height (F on the drawing) | 33.9 | 33.9 | 33.9 | 33.9 | 33.9 | 33.9 | 33.9 | 33.9 |
| BB drop (G on the drawing) | 1.8 | 1.8 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 |
| Chainstay length (H on the drawing) | 44.8 | 44.8 | 44.8 | 44.8 | 44.8 | 44.8 | 44.8 | 44.8 |
| Offset (I on the drawing) | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 |
| Trail (J on the drawing) | 12.2 | 12.2 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 |
| Wheelbase (K on the drawing) | 120.2 | 120.2 | 123.0 | 123.0 | 127.8 | 127.8 | 131.4 | 131.4 |
| Standover (L on the drawing) | 75.8 | 75.8 | 76.9 | 76.9 | 76.9 | 76.9 | 77.9 | 77.9 |
| Reach (M on the drawing) | 43.0 | 43.0 | 45.0 | 45.0 | 49.0 | 49.0 | 51.5 | 51.5 |
| Stack (N on the drawing) | 59.8 | 59.8 | 63.1 | 63.1 | 64.9 | 64.9 | 67.2 | 67.2 |
| Frame size | 15.5" | 15.5" | 17.5" | 17.5" | 19.5" | 19.5" | 21.5" | 21.5" |
| Position | Low | Low | Low | Low | Low | Low | Low | Low |
| Wheel size | 27.5" | 27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" |
| Eff. seat tube angle | 77.4° | 77.4° | 77.2° | 77.2° | 77.0° | 77.0° | 76.9° | 76.9° |
| Front Center | 75.4 | 75.4 | 78.3 | 78.3 | 83.1 | 83.1 | 86.7 | 86.7 |
The Atlanta Cycling difference
Specs matter. But so does how a bike feels when you ride it. Our team is here to help you choose the right size, understand the details, and get comfortable before your first ride.
When you buy from Atlanta Cycling, you're not just getting a box with a bicycle in it. You're getting a 30-day money-back guarantee, a complimentary baseline fit, lifetime basic adjustments, and real people who want you to love every mile.
Four neighborhood stores. One shared passion.
Ansley. Alpharetta. Roswell. Vinings. Stop by, take a test ride, ask questions, and meet the people who will be here long after your first ride.
