Quote:
Originally Posted by Joshinator99
A 305/30/20 has a 3.6” sidewall and a 27.2” diameter across the tire. A 345/30/20 has a 4.1” sidewall and a 28.1” diameter. Tire manufacturers play a little role, but a 345/30 means that 30% of the width is the sidewall, so a wider tire with the same aspect ratio means a taller sidewall, and taller overall tire. Hope that helps.  |
Thank you, I get it now. So my 285s and my 305s fall under the acceptable percentage difference.