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 | 36 | 36 | 48 | 40 | 47 | 42 | 42 | 61 |
| Stack | 66 | 59 | 61 | 57 | 54 | 55 | 63 | 75 |
| Top Tube (effective) | 53 | 63 | 56 | 70 | 64 | 62 | 54 | 68 |
| Seat Tube C-T | S | S | M | M | L | L | XL | XL |
| Seat Tube C-C | 34 | 38 | 37 | 35 | 46 | 38 | 39 | 40 |
| Seat Tube (effective) | 66 | 70 | ||||||
| Head Angle | 66 | 53 | 72 | 59 | 53 | 59 | 69 | 74 |
| Seat Angle | 84 | 62 | 86 | 85 | 81 | 84 | 87 | 65 |
| Head Tube | 8 | 8 | 8 | 10 | 10 | 11 | 15 | 12 |
| Chainstay | 44 | 46 | 48 | 45 | 39 | 44 | 40 | 44 |
| Wheelbase | 139 | 152 | 102 | 101 | 139 | 108 | 151 | 134 |
| Standover | 68 | 73 | 87 | 66 | 79 | 89 | 94 | 80 |
| BB Drop | 1 | 1 | 2 | 2 | 2 | 1 | 2 | 1 |
| BB Height | 31 | 33 | 28 | 28 | 29 | 35 | 35 | 28 |
| 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 | 3 | 4 | 5 | 4 | 4 | 3 | 3 | 3 |
| Rear Travel | 11 | 13 | 11 | 14 | 15 | 15 | 11 | 10 |
| 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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