[gorrilla]

We have never had any problems with the 6' versions breaking (yet).

Just treads coming off all the time;
At the rukus before ship they all (6 treads!) came off.

At the Floirda Regional the center-wheel-treads came off 3 times, two of our Sf' matches were played mising the tread on our right-center wheel (luckily we had 9 other wheels in contact with the carpet)

Each time they would come off, I would re-riviet them back on; 2 in each end, then one in between each spoke. I finally got tired of this after doing each of our 6 plaction wheels twice. So I got some 7-minute epoxy and glued them on....no more treads came off, except for the right center during the Sf'......