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"
To view geometry data you must use a web browser that supports JavaScript. See: browser-update.org
Add to Compare
Reach 38 39 52 42 52 40 44 58
Stack 62 69 50 50 63 64 68 66
Top Tube (effective) 63 57 55 51 70 72 75 72
Seat Tube C-T S S M M L L XL XL
Seat Tube C-C 37 41 40 42 40 47 51 39
Seat Tube (effective) 63 88
Head Angle 55 59 63 52 55 63 55 64
Seat Angle 84 80 86 86 70 87 74 76
Head Tube 8 9 11 8 12 10 11 13
Chainstay 43 36 36 48 48 45 39 39
Wheelbase 109 150 122 100 150 150 156 105
Standover 83 83 64 68 76 69 67 66
BB Drop 1 1 2 2 2 1 2 1
BB Height 37 33 34 28 38 28 36 31
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 4 4 4
Rear Travel 11 10 12 13 14 11 13 14
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

Also! Search by Stack and Reach

You can now search the database by numbers.

Find bikes that match your geometry criteria.