What compound were you using?

I'm pondering trying some of the 13" tires.

 

For 13" I am guessing you are using them for autox? In that case I would think you would want to get the softest FA compounds you can get. In my case I was using the 25B because IIRC that is the only compound available in 23.0 x 9.5R15

 

Same here, tried 25B's. Also G19 Goodyear. FA's while being light, have lots of downforce and are only driven at race speeds. Thus, they generate a fair amount of heat in the tires eventually. I found FA scrubs took a little work to get warm, especially on a cool day. Once hot though, they were as fast as 275 A6's and faster rolling. That they could be sourced for about $75 a piece and still have an hour or two left in them was nice.

 

ZX-Tex, was that Dan and the 23.0 x 9.5R15 radial slicks?