First of all, apologies to TeamRX8 for our little spat awhile back about 235 versus 245 tires.

Having said that, I found something interesting with the Azenis tires while browsing Edge Racing. While I know rolling diameter is a poor comparison between tire manufacturers, for sizes within the manufacturer it should be more comparable as their process will be the same. The Azenis 235/40s having a rolling diameter of 25.5 versus that of 25.6 for the 245/40s. That's only a difference of a tenth of an inch or about 0.4% in speedo error. Is that a correct figure? The 235s are also 2.3 pounds lighter per Edge Racing, but have 0.4 inches less tread width. However, there should be slightly less sidewall deflection with the narrower tire. Anyone have any thoughts or comments about this? I'm just throwing out the fact for discussion for the good of the community.

 

You probably wont ntoice a difference on the street

 

I'm talking from a performance point of view, what are the tradeoffs and whether people know if the 0.1 inch rolling diameter difference is accurate.