Englishmaninwales Posted January 14, 2012 Share Posted January 14, 2012 Far too cold to go outside and measure a tyre 😳Tried a quick search, what is the circumference of the 215 55 13? Edited by - englishmaninwales on 15 Jan 2012 10:33:33 Link to comment Share on other sites More sharing options...
Sgt Pepper Posted January 14, 2012 Share Posted January 14, 2012 Malcolm, By my maths I reckon 1780.57mm ie. (3.142 x [215x55%x2 + 13x25.4]) Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted January 14, 2012 Area Representative Share Posted January 14, 2012 Avon's web site lists a diameter of 559mm, which give a circumference of 1756mm Link to comment Share on other sites More sharing options...
Stuart Miller 7 Posted January 15, 2012 Share Posted January 15, 2012 Malcolm I'll get my tape measure out tomorrow - I need to measure up my Barnby's for Mike anyway. Apparently lighter wheels will make him faster *rolleyes* You need a heated garage!  Stu Link to comment Share on other sites More sharing options...
david nelson Posted January 15, 2012 Share Posted January 15, 2012 I think the Avons and Khumos are the same size. I use the same size in my stack and the gps is spot on. David Link to comment Share on other sites More sharing options...
Englishmaninwales Posted January 15, 2012 Author Share Posted January 15, 2012 Thanks everyone - Doh! Had I looked at the diameter I could have saved trouble 😳 David the Khumos are smaller (I think 1647mm )  Link to comment Share on other sites More sharing options...
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