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View Full Version : 82mm bearingsa compared to the 75mm bearings for strength



Corrado_Guy
03-12-2016, 06:19 PM
I have a 2000 A4 with a 1.8T which has the 75mm wheel bearings and it makes 300 hp plus at the crank so it can put a little more stress on things. I replace the wheel bearings every year or two and typically they make noise at higher speeds but are still very tight. I pulled my rears apart today and they both feel like they are indexed when they spin and the drivers side was really bad but no slop. The thing I am wondering is whether the larger 82mm bearings are any stronger and whether it is worth upgrading to them? I don't mind changing them because it takes 30 minutes per corner with a hub shark but if bigger was better then maybe upgrading them would be worth it. I would keep the 5 speed because it works really well with the BT so it would be for bearings only.

walky_talky20
03-12-2016, 07:42 PM
I have 275k miles on my car right now. I've put in 3 of the rear bearings so far (75mm), and I have not changed either of the fronts yet (82mm). I've owned the car since 135k. I'm not certain it makes that much difference, but it must have been enough of a difference for Audi to design 2 different sizes. So there must be something to it.

If I was doing this upgrade to 82mm bearings, I would also swap to the aluminum uprights and lightweight front hubs at the same time.