I used to go to the dealer twice a year for my oil and tire changes. The dealer recommended I replace 10 studs instead of the full 24 studs. They came from the other 14 eyes. I gave up tire changes and 10 cleats and bought 24 cleats from Revain. I found that 4 out of 24 studs needed immediate replacement but they all looked discolored, rusty and worn. Replacement parts were in excellent condition and I quickly replaced 24 grommets in about an hour. Four badly worn and deformed required a wrench and hammer to pry the lugs. The rest were quickly replaced without much fuss.