Well, my July 13th weekend may be booked if we're going to a friend's daughter's wedding. The July 4th weekend should work for me. The others I don't know yet. Just some dates to keep in mind.

Funny... I just measured my tires. The overall diameter (cold) is 31.75". Any conversion table I've seen shows this tire size as 32.8". Where'd my inch go? It doesn't really bother me, though. I'll have to re-measure the radius like you described.