tyre size???????

Post by **oldiguana** » 01 Jul 2006, 17:38

eyup ducks,im having a problem working out my rolling radius on my tyres on my van,the tyre size is "185r14".....im okay with the 185 and the 14 but does the "r" mean it is a 70 or an 80 tyre?baffling the crap out of me!

Post by **Ivorblueun** » 01 Jul 2006, 17:49

the r just means its a radial tyre and if it doesn't show an aspect ratio then i beleive its usually 80 but for the anorak ins and outs of tyres take a look here even has a calculator http://www.chris-longhurst.com/carbible ... bible.html

Post by **toomanytoys** » 02 Jul 2006, 09:15

As a rule the std 14" tyres are 650mm diameter

Post by **"WEAZLECHIN"** » 03 Jul 2006, 21:02

jack the van up, put a tape measure around the outside of the tyre, go up the tyre shop do it to a bigger tyre, see what the difference is then you can work out the difference per revolution.

Post by **kevtherev** » 03 Jul 2006, 22:22

http://www.tyresave.co.uk/tyresize.html