Bike Buying Guide Size May 2026

When standing over the bike's top tube with both feet flat, you should have at least 1 inch of clearance on a road bike and 2–3 inches on a mountain bike for safety. 3. Understanding Advanced Fit (Reach & Stack)

If you are between sizes, or comparing different brands, look at "Reach" and "Stack" on the bike's geometry chart. bike buying guide size

The vertical height from the pedals to the handlebars. A higher stack puts you in a more upright, comfortable position. 4. Sizing for Kids When standing over the bike's top tube with