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 | 39 | 44 | 49 | 49 | 57 | 52 | 42 | 45 |
| Stack | 61 | 49 | 56 | 53 | 65 | 76 | 66 | 54 |
| Top Tube (effective) | 66 | 52 | 55 | 53 | 66 | 53 | 78 | 67 |
| Seat Tube C-T | S | S | M | M | L | L | XL | XL |
| Seat Tube C-C | 42 | 43 | 42 | 47 | 46 | 46 | 44 | 48 |
| Seat Tube (effective) | 91 | 84 | ||||||
| Head Angle | 56 | 60 | 54 | 57 | 67 | 65 | 74 | 73 |
| Seat Angle | 92 | 77 | 83 | 83 | 91 | 68 | 65 | 76 |
| Head Tube | 9 | 11 | 8 | 8 | 10 | 9 | 11 | 14 |
| Chainstay | 45 | 39 | 38 | 43 | 41 | 44 | 51 | 53 |
| Wheelbase | 131 | 147 | 109 | 99 | 147 | 129 | 119 | 118 |
| Standover | 73 | 80 | 81 | 91 | 62 | 72 | 77 | 65 |
| BB Drop | 1 | 1 | 2 | 2 | 1 | 1 | 2 | 2 |
| BB Height | 30 | 35 | 38 | 31 | 35 | 29 | 39 | 30 |
| 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 | 3 | 4 | 3 | 4 | 4 | 4 |
| Rear Travel | 10 | 13 | 14 | 15 | 15 | 10 | 11 | 12 |
| 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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