How Do You Calculate Bicycle Frame Size?
As the late bicycling expert Sheldon Brown’s website notes, with so many bicycle sizes and nuances in frame geometry, determining the size of a frame is no longer an exact science. Generally speaking, though, a tried-and-true old school method most often yields the correct frame size number. Being able to determine frame size is crucial in numerous situations, particularly if you are in the market for a used bike that does not bare a label indicating its size. Lean your bicycle, or the bicycle in question, up against a wall or other sturdy surface. Locate the bottom bracket portion of the frame as well as the seat tube. The bottom bracket is the part of the frame that the crank arms fit into. The crank arms are the parts, on either side of the bottom bracket, that accept your pedals. The seat tube extends from the bottom bracket up to the part of the frame where you insert the seatpost. The seatpost goes into the top of the seat tube. Measure from the center portion of the bottom brack
