Personally I think the SupraSales off-road tires are quite firm, I don't think that will be an issue with them. If anything I think they might be a little too firm for racing, but great, long-wearing compound if you are a basher, or race for fun and don't mind sacrificing a bit of traction for longer life.

They do have a "Pro" version now with molded foams and softer compound, but they are more expensive.

On a recent order to supra sales(1month ago), i got 2 entire sets of wheels with tires mounted. And the Inner hex area has been enlarged and my 17mm 1/2 socket fits fine, I experienced the same as you before with the hex being to small but that was with my first set like a year ago. BUT IM NEVER ORDERING FROM SUPRA, THEIR RIMS CRACK EASILY! Just from a little fun at Pegasus hobbies, a small local track.

my basher set, has managed not to crack yet...Maybe my stock Z car's unique hex pattern, has something to do with the inner hex area prone to cracking...
http://img510.imageshack.us/img510/8...1101251731.jpg

Maybe the newer rims aren't as durable as the old?

My first set broke too Cain way to easy...They just are as durable as OG wheel companies like proline, aka, etc..my white dish wheel on left is from recent order, and actual wheel with spokes is from first order over a year ago.
http://i133.photobucket.com/albums/q.../badwheel3.jpg
http://i133.photobucket.com/albums/q.../badwheel2.jpg
http://i133.photobucket.com/albums/q.../badwheel1.jpg
I am not doing 10foot jumps or anything crazy at all, nor gunning it over jumps and seeing how much air I can get this damage is just from a small local track. With legit wheels I never have cracked one.

what did suprasales say after you showed them the pics?

They sent me a replacement, free shipping, but I broke another one a couple days later at pegasus again...the tires are in perfect shape, I'm going to try and demount these tires and buy some legit wheels.

Bumer, I have done some crazy stuff with my couple of sets and nothing has cracked or broken yet...

The black composit seems a bit tuffer than the white though. Just by touch I can tell that the white plastic seems a bit more brittle.

maybe, the stuff I had was the black composite as well, spoked version.

I just purchased a set of the paradas on the black spokes, I wanted to go for their Pro versions but they don't have them in any good tread patterns. Should make for a good set of practice tires...