Bike Size Chart
What Size Bicycle is Right For My Height?
Your inseam is the most often consulted one. Most bike size charts note the stand-over height. This is your inseam plus another 1-2 inches for comfortable clearance of that top tube. Some sources claim that road bikes require 1-2 inches clearance while mountain or commuter bikes need 2-4 inches.
Consider what kind of bike you want. Sizing varies greatly between road and mountain bikes, as well as between men’s and women's model and even between individual manufacturers. You’ll want to be familiar with your own wants and needs before determining what size is right for you. Many manufacturers have their own sizing charts that will steer you in the right direction.