And some wheel spacers. I had Ron supply dimensions for the hub bore to my wheel manufacture when they were building my wheels, but unfortunately he provided the spec for steel wheels. This left me with a rear wheel hub bore about .030" from being hub centric for the drive plate . Talked to Speedway Engineering about turning down the drive plate hub. They told me I could take a 1/4" off without affecting strength! Only needed about .030, so had the drive plate turned down and a steel sleeve pressed on. This solved two problems. Number one, it makes the wheel hub centric, and number two, it allowed me to have hub centric spacers made, but to also pilot the wheel with the maximum thickness spacer. No this wasn't a cheap fix.