How Do You Measure Frame Size On A Bicycle?
Most bicycles have a sticker somewhere on the frame indicating the size of the frame. For some people, the number 17 or 54, or the letters XS, S, M, L or XL cause confusion. Determining that number–the bike’s frame size–takes just a few seconds. Finding a bike you feel comfortable on can require much more time. Lean the bike against a wall or some other stable surface. Locate the seat tube portion of the frame. From the floor, the seat tube extends up from the bottom bracket. The bottom bracket is the portion of the frame the crank arms fit into. The crank arms are the part of the bike your pedals fit into. The seat tube ends at the seat collar, which is where the bicycle’s seat post enters the frame. Measure the seat tube from top to bottom or bottom to top. You can begin at either end of the seat tube. Just be sure not to extend into the seat post area or too far to the ground. Place the end of the tape measure at the center of the bottom bracket. This is directly in the middle of
