Difficulty: Moderately Easy
Step1
Make sure that it is the proper type of bicycle frame. A mountain bike frame will work well for off-road riding, a road bike frame is lighter and slimmer to save weight on paved surfaces, and a hybrid bicycle frame is somewhere in the middle. Buy the type which goes with the style of biking that most appeals to you.
Step2
Get the right size bike frame. First measure the inside of your leg from foot to crotch.
Step3
Use the measurement to select the proper bike frame size. If you want a road bike, you should subtract 9" from the measurement, whereas for a mountain bike you should subtract a foot.
Step4
Decide if you are interested in recreational riding or racing. Racing bike frames often have slightly different geometry. They will help you to move a bit faster, but will also be a bit less stable and comfortable.
Step5
Figure out what material you want. Steel is inexpensive and strong, but it is also very heavy. Higher performance aluminum, titanium and carbon fiber frames are more expensive.