5/29/2023 0 Comments Bike fit geometry calculator![]() ![]() Choosing a frame smaller than this will create problems down the road, if higher handlebar position is desired. If the frame has a sloping top tube (common on “compact” frames) consider this the desired clearance at mid-point. You want about 25mm clearance above the top tube of a road bike. This is the measurement corresponding to what some bicycle companies refer to as “standover height.” Have your assistant mark the wall at the top of the book spine. Stand with bare feet, six inches apart, using the book like a set square, with leading edge against the wall. You might recruit a friend to wield the pencil, while you snug the spine of the book into your perineum with about the same pressure as sitting on a saddle. You can do this at home with just a pencil and a large, hardcover book. We are interested in the full measurement from floor to pubic bone. ![]() How do you determine correct frame size? Frame “height” (seat tube)Ī few physical dimensions are in order, beginning with what is commonly referred to as “inseam,” but has little to do with what a tailor measures. For instance, the geometry of a diamond frame randonneur bike will feature longer chain stays than a racing machine, to lengthen wheelbase and fit bigger tires. Ideally, bicycle frames are designed according to intended use. In the end, however, theory and formulae should take a back saddle to real world experimentation and refinement.In the same way a “bike fit calculator” might estimate, the information on this page will give most people a good starting point in the search for a comfortable and efficient riding position.Especially for long-distance cycling, comfort is the first consideration.Fashion should be left out of the equation entirely. There is no “one-size-fits-all” when it comes to bike fit. ![]()
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