I just bought a set of CP10's from my friend today for my del Sol. I was putting them on and I found two centering rings with them. So I installed the rings on the front wheels and everything seemed to be fine. I torqued all lug nuts to 75 ft. lb. After driving for a while I noticed that there is slight vibration and my girlfriend mentioned (I noticed also) that the car seemed to be riding a little more harshly. All I did was put on the wheels, I didn't have a chance to check the tire pressure or anything? Could that maybe be it? Should I have left those rings out?

 

If you have driven a moderate amount after torquing the lugs, try retorquing them. Sometimes they loosen and require retorquing a few times before you get the nuts to seat properly

And is 75 ft-lb the correct amount of torque (just double checking)? My accord uses 80 ft-lb for the wheel lugs, thou the del sol ones could be different.

 

I have driven on them for one day now. I am going to check them and re-torque them tonight. I double checked and I you are right, it is 80 ft. lbs. I wouldn't think that being 5 or 6 ft. lbs. off would mess it up. Or would it?

Also The wheels have Yokohama Paradas on them. Could they be the reason for the harsher ride? I know tires have different characteristics.