Wider and Thinner Tires on Sport Rims

RedlineZ

Looks like you used the tire calculator site...

Tire size calculator

The site will also tell you the side wall heights. Remember that there will be some visual change despite the physical change. For example, a stock 245/40/19 tire changed to a new 275/35/19 tire goes from a 3.9 inch sidewall to a 3.8 inch sidewall, but there will be a lot more bulge due to how it sits on the 19x9 inch rim, and therefore may appear larger to the eye.

The rest of it is give and take, IMHO. A wider tire looks good and gives a little more contact patch, but may add rotational weight and rob some response sharpness from the handling. The differences can be minor or noticeable, so it depends on the owner/driver. Personally, my street set up isn't for eeking out the last bit of performance, so I go with big fat meats. But the track tires aren't (or won't be when I get them) as aggressive.

Hope my .02 cents helps... Good luck!

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ChrisSlicks

Use the manufacturer specs for tire diameter as they vary somewhat between brands.

You are shooting for a tire diameter as close to being between 26.5 and 27 as possible. Just as important, the difference between front and rear should be less than 0.5".

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