The Rail 5 625 is an electric mountain bike built for ripping the big stuff. It features the same high-end trail tech as our analogue trail bikes, plus a powerful new Bosch drive system that's basically like having your own shuttle.
It's right for you if...
You’re looking for an e-MTB that’s just as ready to shred as non-electric trail bikes. You want a powerful Bosch drive system that’ll propel you up climbs so you can hit lap after lap.
The tech you get
A burly alloy frame with 150 mm of rear travel and a 625 Wh Removable Integrated Battery, an e-MTB optimised 160 mm RockShox 35 Gold RL fork, the latest from Bosch with smart system Performance Line CX capable of speeds up to 20 mph (25 km/h in Europe), including the new Bluetooth® LED remote for easy connectivity and all-in-one navigation and activity tracking through the eBike Flow app. Plus, a 1x12 drive train with a wide gear range so you can always find the ideal cadence for the motor, a dropper post, powerful 4-piston brakes for more downhill confidence and 29er wheels with nimble yet grippy 2.6" tyres.
The final word
The Rail 5 625 is our best-value long-travel e-MTB. It's equally as capable as our regular long-travel trail bikes, it just gets you back to the top in a flash. Plus, the bigger battery means more time on the trail.
Why you'll love it
- Bosch's new smart system gives you all the same power and responsiveness with a new Bluetooth-connected LED remote and eBike Flow app that puts even more control and customisation at your fingertips
- 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 to remove the battery without tools and lets you mount a water bottle cage
- The controller has Walk Assist and an intelligent e-MTB mode that automatically delivers the right amount of power based on your terrain
- Made with the same hard-charging frame tech as Slash, like Mino Link adjustable geometry, a Straight Shot down tube for extra stiffness and Active Braking Pivot (ABP)
- The bigger battery means you can adventure for longer between charges
- The bigger battery means you can adventure for longer between charges
| Frame size number | Frame size letter | Geometry position | Wheel size | A — Seat tube | B — Seat tube angle | Effective seat tube angle | C — Head tube length | D — Head angle | E — Effective top tube | F — Bottom bracket height | G — Bottom bracket drop | H — Chainstay length | I — Offset | J — Trail | K — Wheelbase | L — Standover | M — Frame reach | N — Frame stack |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.5" | S | High | 29" | 41.0 | 68.0° | 75.4° | 10.5 | 64.9° | 58.7 | 34.4 | 2.9 | 44.7 | 4.3 | 12.7 | 119.5 | 74.8 | 42.5 | 62.3 |
| 15.5" | S | Low | 29" | 41.0 | 67.6° | 75.0° | 10.5 | 64.5° | 58.8 | 33.9 | 3.5 | 44.8 | 4.3 | 13.1 | 119.6 | 74.3 | 42.0 | 62.6 |
| 17.5" | M | High | 29" | 42.0 | 68.0° | 75.4° | 10.5 | 64.9° | 61.1 | 34.4 | 2.9 | 44.7 | 4.3 | 12.7 | 122.0 | 77.8 | 45.0 | 62.2 |
| 17.5" | M | Low | 29" | 42.0 | 67.6° | 75.0° | 10.5 | 64.5° | 61.3 | 33.9 | 3.5 | 44.8 | 4.3 | 13.1 | 122.1 | 77.3 | 44.5 | 62.6 |
| 19.5" | L | High | 29" | 45.0 | 68.0° | 75.4° | 11.0 | 64.9° | 63.3 | 34.4 | 2.9 | 44.7 | 4.3 | 12.7 | 124.3 | 76.7 | 47.0 | 62.7 |
| 19.5" | L | Low | 29" | 45.0 | 67.6° | 75.0° | 11.0 | 64.5° | 63.4 | 33.9 | 3.5 | 44.8 | 4.3 | 13.1 | 124.3 | 76.2 | 46.5 | 63.0 |
| 21.5" | XL | High | 29" | 50.0 | 68.0° | 75.4° | 12.0 | 64.9° | 66.5 | 34.4 | 2.9 | 44.7 | 4.3 | 12.7 | 127.7 | 78.0 | 49.9 | 63.6 |
| 21.5" | XL | Low | 29" | 50.0 | 67.6° | 75.0° | 12.0 | 64.5° | 66.6 | 33.9 | 3.5 | 44.8 | 4.3 | 13.1 | 127.8 | 77.5 | 49.5 | 63.9 |
- FRAME:
- Alpha Platinum Aluminium, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, magnesium rocker link, Motor Armour, Mino Link, ABP, Boost148, 12 mm thru axle, 150 mm travel
- FORK BRAND:
- RockShox
- FORK:
- RockShox 35 Gold RL, DebonAir spring, Motion Control damper, lockout, tapered steerer, 44 mm offset, oversized crown for eMTB, Boost110, 15 mm Maxle Stealth, 160 mm travel
- FORK TRAVEL:
- 160 mm
- SHOCK:
- RockShox Deluxe Select+ RT, 230 mm x 57.5 mm
- HUB FRONT:
- Bontrager sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle
- HUB REAR:
- Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12 mm thru axle
- SKEWER REAR:
- Bontrager Switch thru-axle, removable lever
- RIM:
- Alex MD35, tubeless compatible, 32-hole, 35 mm width, Presta valve
- TYRE:
- Bontrager XR4 Comp, wire bead, 30 tpi, 29x2.60"
- WHEEL SIZE:
- 29
- SHIFTER:
- Shimano Deore M6100, 12-speed
- REAR DERAILLEUR:
- Shimano Deore M6100, long cage
- CRANK:
- E*thirteen E*spec Plus, 34T, 165 mm length
- CASSETTE:
- SunRace CSMZ800 11-51, 12 speed
- CHAIN:
- Shimano Deore M6100
- SADDLE:
- Bontrager Arvada, steel rails, 138 mm width
- SEATPOST:
- Size: S TranzX JD-YSP18, 100 mm travel, internal routing, 31.6 mm, 361 mm length Size: M, L, XL TranzX JD-YSP18, 130mm travel, internal routing, 31.6 mm, 425 mm length
- DROPPER SEATPOST:
- Yes
- GRIPS:
- Bontrager XR Trail Comp, nylon lock-on
- STEM:
- Bontrager Rhythm Comp, 31.8 mm, Knock Block, 0-degree, 50 mm length
- BRAKE:
- Tektro HD-M745 4-piston hydraulic disc
- BRAKE ROTOR:
- Tektro, 6-bolt, 203 mm
- MOTOR:
- Bosch
- DRIVE UNIT:
- Bosch Peformance Line CX (85 Nm ) Smart System
- BATTERY:
- Bosch PowerTube 625 Wh Battery
- PEDALS:
- Available for Purchase
- MODEL YEAR:
- Previous Models
- Availability:
- Please see table above
- Please Note:
- Trek reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing.
