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 | 50 | 36 | 40 | 36 | 44 | 53 | 57 | 51 |
| Stack | 54 | 55 | 59 | 75 | 71 | 69 | 79 | 58 |
| Top Tube (effective) | 50 | 55 | 59 | 58 | 65 | 64 | 76 | 74 |
| Seat Tube C-T | S | S | M | M | L | L | XL | XL |
| Seat Tube C-C | 39 | 39 | 42 | 41 | 51 | 46 | 48 | 53 |
| Seat Tube (effective) | 92 | 62 | ||||||
| Head Angle | 56 | 60 | 56 | 71 | 54 | 71 | 67 | 77 |
| Seat Angle | 89 | 78 | 73 | 84 | 76 | 83 | 87 | 63 |
| Head Tube | 10 | 11 | 9 | 10 | 11 | 14 | 16 | 12 |
| Chainstay | 38 | 52 | 49 | 51 | 45 | 52 | 47 | 52 |
| Wheelbase | 118 | 123 | 120 | 138 | 134 | 151 | 113 | 105 |
| Standover | 83 | 64 | 80 | 74 | 73 | 78 | 89 | 78 |
| BB Drop | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 |
| BB Height | 38 | 27 | 34 | 30 | 36 | 41 | 36 | 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 | 4 | 3 | 4 | 5 |
| Rear Travel | 12 | 10 | 13 | 12 | 13 | 12 | 10 | 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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