Tyre aspect ratio calculator

[milothedog]

This shoud help some of you guy's when deciding what size tyres to fit, it even tells you how much your speedo will be out


http://www.carbibles.com/tyre_bible_pg4.html

Ian.


Just under 3 mph at 70 Dean

[KOY 23]

Good one Ian.

Thanks

[Jeff]

Thanks Ian,

I have always hated the low profile tyres on my 'other'car, feel every fault in the road surface and any hole deeper than 20mm feels like you have hit a kerb head on at 40mph. Great on a race track and in Spain, but not on English roads.

Also, my speedo has always been out by approx 5mph at 70mph according to sat nav, so need to change tyres to a different size.

The link you supplied told me what size tyres I can change to and this will also rectify a difference of approx 5mph at 70mph to the better.

I currently have 225.45R17 and will change to 225.55R17.

Thanks again Ian, forum strikes again!

Jeff.