Actual Frame Size 23" 21" 19" 17.5" 15.5"
ASeat tube 58.4 53.3 48.3 44.5 39.4
BSeat tube angle 72.0 ° 72.0 ° 72.0 ° 72.5 ° 73.0 °
CHead tube length 11.8 11.8 10.3 10.3 10.3
DHead angle 69.6 ° 69.6 ° 69.6 ° 69.3 ° 69.3 °
EEffective top tube 66.3 64.3 62.2 60.2 57.0
FBottom bracket height 31.2 31.2 31.2 31.2 31.2
GBottom bracket drop 5.3 5.3 5.3 5.3 5.3
HChainstay length 44.5 44.5 44.5 44.5 44.5
IOffset 5.1 5.1 5.1 5.1 5.1
JTrail 8.1 8.1 8.1 8.3 8.3
KWheelbase 116.9 114.8 112.7 111.6 109.0
LStandover 85.9 82.8 79.5 77.5 75.4
MFrame reach 46.2 44.2 42.6 41.2 38.6
NFrame stack 61.7 61.7 60.3 60.2 60.2
Actual Frame Size 23" 21" 19" 17.5" 15.5"
ASeat tube 22.99 20.98 19.02 17.52 15.51
BSeat tube angle 72.0 ° 72.0 ° 72.0 ° 72.5 ° 73.0 °
CHead tube length 4.65 4.65 4.06 4.06 4.06
DHead angle 69.6 ° 69.6 ° 69.6 ° 69.3 ° 69.3 °
EEffective top tube 26.10 25.31 24.49 23.70 22.44
FBottom bracket height 12.28 12.28 12.28 12.28 12.28
GBottom bracket drop 2.09 2.09 2.09 2.09 2.09
HChainstay length 17.52 17.52 17.52 17.52 17.52
IOffset 2.01 2.01 2.01 2.01 2.01
JTrail 3.19 3.19 3.19 3.27 3.27
KWheelbase 46.02 45.20 44.37 43.94 42.91
LStandover 33.82 32.60 31.30 30.51 29.68
MFrame reach 18.19 17.40 16.77 16.22 15.20
NFrame stack 24.29 24.29 23.74 23.70 23.70

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.