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 | 43 | 47 | 41 | 48 | 45 | 44 | 44 | 58 |
| Stack | 59 | 65 | 53 | 62 | 72 | 67 | 74 | 64 |
| Top Tube (effective) | 58 | 45 | 61 | 48 | 72 | 65 | 54 | 57 |
| Seat Tube C-T | S | S | M | M | L | L | XL | XL |
| Seat Tube C-C | 41 | 34 | 42 | 46 | 51 | 50 | 43 | 55 |
| Seat Tube (effective) | 64 | 62 | ||||||
| Head Angle | 74 | 72 | 67 | 68 | 62 | 60 | 74 | 74 |
| Seat Angle | 78 | 84 | 80 | 76 | 80 | 91 | 63 | 78 |
| Head Tube | 9 | 10 | 9 | 8 | 9 | 13 | 14 | 16 |
| Chainstay | 43 | 40 | 36 | 38 | 44 | 51 | 43 | 39 |
| Wheelbase | 137 | 110 | 110 | 146 | 145 | 121 | 107 | 156 |
| Standover | 70 | 83 | 72 | 65 | 85 | 80 | 64 | 83 |
| BB Drop | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 |
| BB Height | 39 | 33 | 33 | 27 | 34 | 35 | 38 | 33 |
| 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 | 4 | 4 | 4 | 4 |
| Rear Travel | 12 | 14 | 11 | 13 | 13 | 13 | 15 | 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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