I've built my 172 into a race car and run slicks, (I think this is where the problem lies) but after 2 15 min races the NSF wheel bearing drones like mad so after every race weekend I have too change the wheel bearings. It looks like they may get very hot as well because sometimes the grease comes out of the bearing. I'm at brands hatch this weekend so it's a bit short notice but if anyone has had this problem and cured it I would be very grateful for any help. Thanks Nick