firstly i have own to of those rim a alex dx32 and a onza ronnie rim, the dirst rim i ran out of the two was a alex dx32 and what a rim it was, lasted about 7 decnt grinds, but i started getting better and doing drop gaps etc and started to dent it, but when i pulled the dints back out about 4 of them craked so this resulted in me buying a onza ronnie rim, the rim was fine until i hit the third grind, it may just be my luck but i was doing a gap a landed on the joint of the rim and folded it a 90`degree angle into my tyre, went to bent it out when arrived at home and it snapped of so no i have a hole on my rim, thankfully in gose no lower than the metal bit inside the tyre here is a pic but it bit rubbish because it off my webcam, digital camera has no battery, but you can still tell my ronnie rim has been abused......here but on a personal note both of the rims where amazing because there vitually the same and there strong, but next time iam not even going to grind my rim, smooth rim with zoo pads all the way.. matt!