Eric, 

Most all on-line tire sales companies have size calculators.

https://www.discounttire.com/learn/tire-size-calculator
https://www.tirebuyer.com/education/tire-diameter-chart
https://tiresizeguide.com/
https://tiresizes.com/tire-size-chart
https://tiresizes.com/tire-size-calculator
https://www.goodyear.com/en_US/learn/choosing-your-tires/tire-size-chart.html
https://www.bridgestoneamericas.com/en/company/safety/choosing-tires/determining-tire-size

Use the search engine of your choice and the search term ’tire size.’

Jim

> On Nov 13, 2024, at 12:06 PM, Eric Caron <ericcaron96@COMCAST.NET> wrote:
> 
> Hi folks,
> How do the over all diameters compare to the following tires on my vanagon and another list members?
> 
> Mine 
> 225/55 R17 
> 
> Karl’s 
> 225/70 R16 
> 
> I’m wondering if Karl’s over all diameter is the same larger or smaller. 
> 
> If larger, what would I need to do to match his size on my R17 rims when future tires are needed.
> 
> Eric Caron