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 49 50 36 48 40 54 55 46
Stack 54 55 59 72 53 56 76 60
Top Tube (effective) 57 50 69 56 70 70 57 75
Seat Tube C-T S S M M L L XL XL
Seat Tube C-C 41 36 45 46 45 42 44 38
Seat Tube (effective) 92 84
Head Angle 53 72 75 66 68 73 53 72
Seat Angle 76 64 63 83 79 73 77 68
Head Tube 10 10 8 11 12 9 17 14
Chainstay 50 52 50 51 43 37 38 35
Wheelbase 143 135 102 112 149 133 155 115
Standover 67 69 72 89 62 91 83 66
BB Drop 1 1 1 2 2 2 1 1
BB Height 30 31 40 27 40 36 38 34
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 4 4 4 3 4 3
Rear Travel 14 13 11 11 14 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.

Image showing geometry measurements

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