Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorized Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

Geometry

Actual Frame Size 15.5" 15.5" 16.5" 16.5" 17.5" 17.5" 18.5" 18.5" 20.5" 20.5"
Geometry Position Low High Low High Low High Low High Low High
ASeat tube 39.4 39.4 41.9 41.9 44.5 44.5 47.0 47.0 52.1 52.1
BSeat tube angle 66.5 ° 67.2 ° 66.5 ° 67.1 ° 66.5 ° 67.1 ° 66.5 ° 67.1 ° 66.5 ° 67.1 °
CHead tube length 10.0 10.0 10.0 10.0 10.0 10.0 11.0 11.0 12.0 12.0
DHead angle 65.0 ° 65.7 ° 65.0 ° 65.6 ° 65.0 ° 65.6 ° 65.0 ° 65.6 ° 65.0 ° 65.6 °
EEffective top tube 55.7 55.5 58.7 58.5 60.0 59.8 61.4 61.1 64.2 64.5
FBottom bracket height 35.0 35.8 35.0 35.8 35.0 35.8 35.0 35.9 35.0 35.9
GBottom bracket drop .6 -.2 .6 -.2 .6 -.2 .6 -.3 .6 -.3
HChainstay length 43.5 43.3 43.5 43.3 43.5 43.3 43.5 43.3 43.5 43.3
IOffset 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4 4.4
JTrail 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7
KWheelbase 114.9 114.7 117.9 117.7 119.2 119.0 120.5 120.4 123.4 123.2
LStandover 79.5 80.2 77.7 78.4 76.2 76.9 75.6 76.4 74.5 75.3
MFrame reach 39.7 40.4 42.7 43.4 44.0 44.7 45.0 45.6 47.4 48.0
NFrame stack 58.1 57.6 58.1 57.6 58.1 57.6 59.0 58.5 59.9 59.4
Actual Frame Size 15.5" 15.5" 16.5" 16.5" 17.5" 17.5" 18.5" 18.5" 20.5" 20.5"
Geometry Position Low High Low High Low High Low High Low High
ASeat tube 15.51 15.51 16.50 16.50 17.52 17.52 18.50 18.50 20.51 20.51
BSeat tube angle 66.5 ° 67.2 ° 66.5 ° 67.1 ° 66.5 ° 67.1 ° 66.5 ° 67.1 ° 66.5 ° 67.1 °
CHead tube length 3.94 3.94 3.94 3.94 3.94 3.94 4.33 4.33 4.72 4.72
DHead angle 65.0 ° 65.7 ° 65.0 ° 65.6 ° 65.0 ° 65.6 ° 65.0 ° 65.6 ° 65.0 ° 65.6 °
EEffective top tube 21.93 21.85 23.11 23.03 23.62 23.54 24.17 24.06 25.28 25.39
FBottom bracket height 13.78 14.09 13.78 14.09 13.78 14.09 13.78 14.13 13.78 14.13
GBottom bracket drop .24 -.08 .24 -.08 .24 -.08 .24 -.12 .24 -.12
HChainstay length 17.13 17.05 17.13 17.05 17.13 17.05 17.13 17.05 17.13 17.05
IOffset 1.73 1.73 1.73 1.73 1.73 1.73 1.73 1.73 1.73 1.73
JTrail 4.61 4.61 4.61 4.61 4.61 4.61 4.61 4.61 4.61 4.61
KWheelbase 45.24 45.16 46.42 46.34 46.93 46.85 47.44 47.40 48.58 48.50
LStandover 31.30 31.57 30.59 30.87 30.00 30.28 29.76 30.08 29.33 29.65
MFrame reach 15.63 15.91 16.81 17.09 17.32 17.60 17.72 17.95 18.66 18.90
NFrame stack 22.87 22.68 22.87 22.68 22.87 22.68 23.23 23.03 23.58 23.39