[suicideneil]

Bigger, if nothing else... I heard the endbells are screwed on, so they dont pop-off like the feigaos at least. Anyway, most of the popular 40series wheels come with 23mm hexes these days, and for serious HP machines I would say they are the strongest option. Bear in mind though, the Pro-line ones dont seem to come off very easily once you have them on, so it might be worth looking around at all the 23mm hexes that are available, fro maximizer, RC4WD, Integy etc. For what its worth, I use alloy 14mm hexes with my massive Imex rubber and havent had any problems thus far....