How To Measure A Bike Frame. Bikes are marked by their saddle Tube-Length. First find the crank center from where it joins the bottom bracket.
This is to ensure you get a machine that fits you and works for the type of riding you intend to do. What youll need to measure a bike frame. When you measure bike frame size you should start from the middle of the tool crank to the upper part of the seat tube.
The first step is to use the top tube and headtube as a straight line.
The seat tube is the vertical part of the triangle of the mountain bike that the frames form. This analysis is normally from the middle of the Bottom-Bracket or the middle of the bolt that attaches the Crank-Arms. Standover height is the distance between the top tube frame and the ground. The measurement varies in a mountain bike since most have a slanted top tube.
