Wheel Size Chart

[afx]

Found this handy wheel size chart.  Doubt the outside bead on every wheel type is exactly 1.5" larger but still useful.

[Ace-Garageguy]

Most helpful. Thanks.

[Pete75]

Thanks JC - will come in handy ?

[peteski]

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.

[Plowboy]

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". 

[afx]

[Brian Austin]

The chart leaves out 15 and 14 inch wheels, two common sizes.  :-P

 

 

[peteski]

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.