TREK Rail+ 8 Gen 5 2025


c

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"
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Reach 50 48 52 36 43 43 45 47
Stack 56 67 75 53 73 66 72 67
Top Tube (effective) 57 61 70 60 72 71 54 73
Seat Tube C-T S S M M L L XL XL
Seat Tube C-C 31 43 46 45 51 42 51 43
Seat Tube (effective) 90 82
Head Angle 58 61 67 52 62 67 57 55
Seat Angle 78 90 76 89 67 65 82 91
Head Tube 9 9 9 11 9 11 13 14
Chainstay 41 41 38 41 39 41 43 37
Wheelbase 118 146 140 112 124 149 118 133
Standover 79 82 71 72 63 87 95 77
BB Drop 1 2 1 2 2 1 2 1
BB Height 32 29 33 28 37 28 28 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 3 4 3 4 3 3 3
Rear Travel 10 9 11 14 13 14 14 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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