Frame Sizes

Do a google search using words like bicycle fitting, frame size etc.

There are heaps of sites.

Quoted post said:

Originally posted by tomUK
Hi -

I am just in the process of buying a new bike and would like to know if there is anyone out there who knows how to measure someone up correctly for the right frame size. While visiting my local bike shops, all I seem to get is an answer depending what bikes they have left in stock. Now, my theory is to find out for myself then go order the bike from wherever I choose.

Your help would be greatfully recieved.

Thanks.

As suggested, begin by referring to websites dedicated to fitting issues. You will learn that although matching inseam length and seat tube and crank length is important, finding the correct top tube and stem lengths is also crucial, among other issues.

You can also pay for a fitting at bike shops with a Serotta Fit Kit or similar. That uses an adjustable bike frame to find the right positions and measurements.

If you ride a bike now and are comfortable, you might start by measuring it: bb to saddle, saddle to bars, width of bars, seat tube angle, saddle setback from bb, etc. Even so, you might discover from the websites or the Fit Kit that your current position could be improved.

Even if you rely on website or a professional fitting, be prepared to make adjustments as you ride more. Weight loss, flexibility improvement, knee and leg comfort (or discomfort) and generally accommodating to a new bike might cause you to lower your stem or move your saddle up or down or back or up a bit, for example. It might well take several thousand miles to really dial things in.

Having said all this, I will admit that I am a contrarian when it comes to the notion that there is only one "perfect" position. I occasionally ride my son's bike, which has shorter "cockpit" and slightly higher bars. Even though the position is noticeably different, it works fine, even over a century distance. I also set up a bike for time trials, with a much different seat tube angle, reach, etc. It also works great. Maybe I am unusual.

Good luck. A new bike is always a great thing to look forward to. Can't have too many.