Trek Rail AL Gen 3 Frameset
Trek / Electric Mountain Bikes
More trail in every ride.
Rail AL Gen 3 Frameset is a hard-charging aluminum e-MTB chassis built to handle tough terrain. Its Alpha Platinum Aluminum frame comes with a RockShox Deluxe Select+ RT shock (150mm rear travel) and is designed for a 160mm fork, giving you a capable platform for aggressive trail riding. Motor and battery not included.
Based on the bike's size chart. Your complimentary baseline fit in store dials in the rest.
Ship to store · free pickup, usually ready in 4–7 business days
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
RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. It’s the most convenient way to remove your battery for transport, security, or just easier charging.
Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.
The new eBike Flow app turns your ride into a personalized experience. Use it to customize your motor's assist behavior, track your ride stats, and integrate your data with apps like Strava and Apple Health. There's even handy features like navigation and service reminders.
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) | 41.0 | 41.0 | 42.0 | 42.0 | 45.0 | 45.0 | 50.0 | 50.0 |
| Seat tube angle (B on the drawing) | 67.6° | 67.6° | 67.6° | 67.6° | 67.6° | 67.6° | 67.6° | 67.6° |
| Head tube length (C on the drawing) | 10.5 | 10.5 | 10.5 | 10.5 | 11.0 | 11.0 | 12.0 | 12.0 |
| 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) | 58.8 | 58.8 | 61.3 | 61.3 | 63.4 | 63.4 | 66.6 | 66.6 |
| 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) | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 |
| 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) | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 |
| Wheelbase (K on the drawing) | 119.6 | 119.6 | 122.1 | 122.1 | 124.3 | 124.3 | 127.8 | 127.8 |
| Standover (L on the drawing) | 74.3 | 74.3 | 77.3 | 77.3 | 76.2 | 76.2 | 77.5 | 77.5 |
| Reach (M on the drawing) | 42.0 | 42.0 | 44.5 | 44.5 | 46.5 | 46.5 | 49.5 | 49.5 |
| Stack (N on the drawing) | 62.6 | 62.6 | 62.6 | 62.6 | 63.0 | 63.0 | 63.9 | 63.9 |
| 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 | 29" | 29" | 29" | 29" | 29" | 29" | 29" | 29" |
| Eff. seat tube angle | 75.0° | 75.0° | 75.0° | 75.0° | 75.0° | 75.0° | 75.0° | 75.0° |
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.
