How To Choose A Bicycle Size

Buying a bicycle can be complicated. With many makes and models out there, it is important that you get one that fits you properly for safety, comfort and performance. Here are four easy steps to make sure you choose a bicycle that is the right size for you.

Know the Facts

Step 1

Understand that bikes are sold according to frame sizes. Mountain bikes are labeled in inches, while road bikes are labeled in centimeters. These sizes generally correspond to your inseam length, so it is important to know your measurement. Take a tape measure and record the distance from your inseam to the ground. Write that number down in inches and centimeters so you will have it when shopping.

Step 2

Do a straddle test. Put one leg over the bike and straddle it with your feet resting comfortably on the ground. Ideally, you want to have 1" of clearance between your inseam and the top of the bike tube for a road bike and 2" or more for a mountain bike. Make sure you are wearing your bike shoes when doing this because they count toward your overall leg length.

Step 3

Sit on the seat with your feet on the pedals. You want to have your seat high enough so you only have a slight bend in your knee when your legs are fully extended down toward the ground. Generally, your seat height does not make a difference in the frame size you choose, because this can be adjusted.

Step 4

Test the bike thoroughly before purchasing it. You should feel in control and have full range of motion with your legs, and your hands should easily be able to reach the brakes. Ask the store salesperson to make adjustments to the seat and handlebars accordingly. Comfort is going to be one of the most important factors in choosing the right bike size for you.

Tips and Warnings

Here is an easy chart from REI to help you determine the best bike size: Inseam Mountain Bike Road Bike 27" 14" 50cm 28" 16" 50cm 30" 16" 50cm 31" 18" 52cm 32" 20" 54cm 33" 20" 56cm 34" 20" 58cm 35" 20" 60cm 38" 22" 60cm 39"+ 24" 60cm