Compute Tyre Upsize

Easiest Way to check Tyre Upsize.

» Step 1: Mention Existing Tyre Profile, Calculate in Dimensions

» Step 2: Mention Proposed Tyre Profile, Calculate in Dimensions

» Step 3: Compute Difference in Tyre Circumference to assess in whether the Proposed Tyre is fit or misfit

R15 185/65 : Here 185 is Tyre Width, 65 is Aspect Ratio and 15 is RIM Size

Interpret Results of Tyre Upsize Deviation

» In Negative : Your Proposed Tyre is actually smaller in Size compared to existing One and not Recommended. Its rather Downsize

» 0 to .5% : Almost Close Match without any Variation to Odometer Speed Reading

» .5% to 2% : Acceptable deviation, can be upsize but recommended to take Opinion on MyCarHelpline Forum

» 2% to 2.5% : Aggressive Upsize, have to have reason before considering this Tyre Upsize, may take opinion on MyCarHelpline Forum

» Above 2.5% : Not Recommended

Tyre Upsize Maximum Limit Basis RIM Width

You might have seen Wheel Size as R16 205/60, 6J or R16 205/60, 6.0*16 Inch Alloys. Here 6J or 6.0 is what the Wheel Width and is specified in inches. One should not deviate from Maximum Tyre Width against the specific Wheel Size. Follow below Calculator sheet

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