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 | 45 | 46 | 47 | 47 | 39 | 52 | 52 | 49 |
| Stack | 52 | 48 | 57 | 63 | 62 | 59 | 72 | 79 |
| Top Tube (effective) | 53 | 51 | 59 | 61 | 63 | 63 | 56 | 64 |
| Seat Tube C-T | S | S | M | M | L | L | XL | XL |
| Seat Tube C-C | 40 | 31 | 33 | 47 | 47 | 49 | 38 | 54 |
| Seat Tube (effective) | 88 | 73 | ||||||
| Head Angle | 60 | 52 | 70 | 70 | 52 | 69 | 75 | 67 |
| Seat Angle | 66 | 74 | 84 | 70 | 90 | 85 | 79 | 92 |
| Head Tube | 9 | 8 | 10 | 8 | 11 | 11 | 12 | 14 |
| Chainstay | 42 | 44 | 46 | 41 | 38 | 43 | 47 | 40 |
| Wheelbase | 112 | 116 | 123 | 115 | 123 | 108 | 149 | 111 |
| Standover | 62 | 71 | 81 | 84 | 86 | 87 | 83 | 67 |
| BB Drop | 1 | 2 | 1 | 2 | 2 | 1 | 2 | 1 |
| BB Height | 28 | 36 | 28 | 31 | 35 | 36 | 35 | 38 |
| 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 | 4 | 4 | 4 | 4 | 3 | 4 |
| Rear Travel | 11 | 13 | 14 | 14 | 15 | 14 | 14 | 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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