afx Posted October 27, 2017 Share Posted October 27, 2017 Found this handy wheel size chart. Doubt the outside bead on every wheel type is exactly 1.5" larger but still useful. Quote Link to comment Share on other sites More sharing options...
Ace-Garageguy Posted October 27, 2017 Share Posted October 27, 2017 Most helpful. Thanks. Quote Link to comment Share on other sites More sharing options...
Pete75 Posted November 3, 2020 Share Posted November 3, 2020 Thanks JC - will come in handy ? Quote Link to comment Share on other sites More sharing options...
peteski Posted November 3, 2020 Share Posted November 3, 2020 In my experience the visible bead of a wheel is 1.5" larger than the diameter specified on the tire. I suppose the chart will come in handy, but my caliper and a calculator for scale calculation also works well. Quote Link to comment Share on other sites More sharing options...
Plowboy Posted November 3, 2020 Share Posted November 3, 2020 2 minutes ago, peteski said: In my experience the visible bead of a wheel is 1.5" larger than the diameter specified on the tire. I suppose the chart will come in handy, but my caliper and a calculator for scale calculation also works well. That's how I do it. Also, I never measure in mms. Just multiply my measurement by 25 and subtract 1.5". Quote Link to comment Share on other sites More sharing options...
afx Posted November 11, 2020 Author Share Posted November 11, 2020 Quote Link to comment Share on other sites More sharing options...
Brian Austin Posted November 27, 2020 Share Posted November 27, 2020 The chart leaves out 15 and 14 inch wheels, two common sizes. :-P Quote Link to comment Share on other sites More sharing options...
peteski Posted November 29, 2020 Share Posted November 29, 2020 While the chart is handy, calculating the size is really not rocket science. Just a basic math operation. And in my experience the outside size of the rim is always 1.5" larger than the tire bead size. At least in passenger cars (which is what this is all about). It is just the way the tire and wheel design works. Quote Link to comment Share on other sites More sharing options...
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