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 | 37 | 43 | 49 | 39 | 46 | 50 | 53 | 61 |
| Stack | 62 | 55 | 59 | 56 | 58 | 76 | 63 | 60 |
| Top Tube (effective) | 45 | 48 | 55 | 57 | 56 | 70 | 71 | 79 |
| Seat Tube C-T | S | S | M | M | L | L | XL | XL |
| Seat Tube C-C | 35 | 35 | 37 | 35 | 37 | 47 | 43 | 55 |
| Seat Tube (effective) | 90 | 89 | ||||||
| Head Angle | 70 | 64 | 66 | 63 | 64 | 71 | 75 | 56 |
| Seat Angle | 85 | 80 | 67 | 64 | 86 | 66 | 74 | 67 |
| Head Tube | 8 | 8 | 8 | 8 | 13 | 10 | 12 | 13 |
| Chainstay | 43 | 52 | 40 | 52 | 36 | 41 | 48 | 43 |
| Wheelbase | 137 | 129 | 124 | 138 | 107 | 138 | 136 | 115 |
| Standover | 88 | 75 | 69 | 67 | 68 | 75 | 94 | 79 |
| BB Drop | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 |
| BB Height | 27 | 27 | 36 | 36 | 28 | 31 | 35 | 37 |
| 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 | 5 | 3 | 4 | 3 | 4 | 4 | 4 |
| Rear Travel | 14 | 9 | 11 | 13 | 15 | 13 | 12 | 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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