how to size a bike for a man
Mountain bike sizes, which usually range from 14 to 21 inches, are also based on seat tube height. But the distance from the center of the bikeâs top tube to the ground, or the stand-over height, is the most important measurement when sizing a mountain bike.ou need to know your bicycle inseam, which is different from clothing inseam, to help you determine your ideal bike size. Stand with your back against the wall on a hard flat surface. Spread your feet 6 to 8 inches apart and place the spine of a book between your legs so it touches your pubic bone.