05-08-2012, 06:27 PM
Assuming your sppedo was correct on std tyres (195/55R15) then the 205/40R17 will be spot on
compared to 195/50R15 then your 3.47% difference
Check this if you want to see for yourself
http://www.etyres.co.uk/tyre-size-calculator.htm
compared to 195/50R15 then your 3.47% difference
Check this if you want to see for yourself
http://www.etyres.co.uk/tyre-size-calculator.htm