Well, If you have a Mini Crawler, you know how much you wish you had Beadlocks. If you're like me and don't want to pay the $120 for a set, and realize you can turn the stock wheels into beadlocks, thanks to the removable rings.... You'd look up a tutorial on cutting PVC to make a grip for the inside.

Looks like Losi released a set to save some PVC troubles

[url=http://www.tlracing.com/Products/Default.aspx?ProdID=LOSB1495]1.9" Inner Locking Ring Wheel: MRC Pro (LOSB1495): Team Losi Racing[/url]

$8 seems better then $120, but you don't get any extra weight and you have to be a bit careful no to strip the wheel screws out