TREK Rail+ 8 Gen 5 2025
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Geometry
| 15.5" | 15.5" | M - 17.5" (High - Geometry position) | 17.5" | 19.5" | 19.5" | XL - 21.5" (High - Geometry position) | 21.5" | |
|---|---|---|---|---|---|---|---|---|
| Add to Compare | ||||||||
| Reach | 46 | 50 | 48 | 37 | 41 | 40 | 56 | 43 |
| Stack | 67 | 63 | 58 | 67 | 73 | 58 | 61 | 76 |
| Top Tube (effective) | 66 | 49 | 56 | 54 | 52 | 70 | 62 | 70 |
| Seat Tube C-T | S | S | M | M | L | L | XL | XL |
| Seat Tube C-C | 41 | 43 | 37 | 37 | 37 | 38 | 48 | 55 |
| Seat Tube (effective) | 73 | 83 | ||||||
| Head Angle | 75 | 62 | 54 | 52 | 76 | 59 | 56 | 75 |
| Seat Angle | 65 | 91 | 65 | 61 | 90 | 74 | 66 | 75 |
| Head Tube | 10 | 9 | 8 | 11 | 12 | 10 | 16 | 14 |
| Chainstay | 44 | 44 | 36 | 46 | 52 | 39 | 46 | 41 |
| Wheelbase | 135 | 142 | 128 | 121 | 130 | 124 | 154 | 107 |
| Standover | 67 | 88 | 94 | 87 | 66 | 77 | 89 | 87 |
| BB Drop | 1 | 1 | 1 | 1 | 2 | 1 | 2 | 1 |
| BB Height | 40 | 39 | 39 | 32 | 30 | 33 | 36 | 39 |
| Wheel Size | 27.5" | 27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" | 29"/27.5" |
| Seatpost Offset | 4 | 4 | 5 | 3 | 4 | 4 | 3 | 3 |
| Rear Travel | 12 | 13 | 13 | 13 | 12 | 13 | 13 | 14 |
| Data Source | None | None | Manufacturer | None | None | None | Manufacturer | None |
Standard measurements are in millimeters and degrees. The site attempts to recognize and convert other units back to standard - results may vary.
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