Have a look at the Monster Retreads from Desser
(http://www.desser.com/monster.html)

I put McCreary AirHawks on my Cherokee last year and I'm *very* happy
with them. Lots of folks at my airport swear by Condors too, they just
cost a wee bit more than the AirHawks when I bought tires last year,
so I'm a cheapskate and bought the AirHawks. Our airport owner uses
nothing but Desser's retreads on his C180 and he flies so much that he
actually wears out a set of tires almost every year, so it makes good
financial sense for him.