I got some maximizer 17mm hex beadlocks with a new set of Proline Mulchers, couldn't get my old set off my glued rims without destroying them, love beadlocks now. I run a 1515/1y with 4S a123 batteries. 20/51 gearing. I also use the Proline gray foams, I think they are the hardest set from Proline. I don't have any problems with ballooning.

It did take me a while to work out the method for putting the rubber on easily, I watched the instructional video so many times haha finally got my method working for me. Can take a little effort to get them balanced but after that its smooth sailing.