I bought a 17 Ford focus it has 195/65r15. Can I go wider and shorter sidewall and keep the 15in? Id like to increase handling if I can. What would be wider and shorter sidewall and still close dimensionally speaking to keep the speedometer close? Maybe a 205/55R15 or something. Seems like there used to be a chart where you could compare sizes vs the radius but I couldn't find it when googling this time around.