Och

iTrader: (3)

I had my brake rotors replaced recently and the mechanic had quite a bit of trouble getting the two screws out that hold the rotor. After he finally got them to budge and replaced the rotors, he didn't replace the screws. He said that they aren't necessary, and they are only there to hold the rotor while the wheel is removed, and once the wheel is replaced, the lug nuts will hold the rotor.

While that makes sense, but what about centering the rotor on the hub?

GSteg

iTrader: (15)

The rotor is centered the same way as the wheels. The center bore of the rotors are concentric with the hub.

porn-adkt

iTrader: (37)

WTF???REaly WTF???

Och

iTrader: (3)

The wheels are actually lug centric, they are centered when your tighten the lugs.

The rotors itself is pretty loose on the hub and not centered on the studs.

GSteg

iTrader: (15)

If you have OEM wheels then they are hub centric.

Unless something happened to your rotors or you got crappy aftermarket (with poor tolerance), the rotors are suppose to be hub centric also.

Och

iTrader: (3)

No, they are OEM rotors. I think you've answered my question, the rotor must not have been centered on the studs, so it looked off center, but it is in fact centered on the hub.

The wheels however are 100% lug centric. (oem 17" 10 spoke)

GSteg

iTrader: (15)

Never seen the 10 spoke 17" but I have the 5 spoke 17" and they're hub centric. If I put a wheel onto my car without lug nuts and lift the wheel vertically, there will be no play at all even though none of the studs are touching the wheel.

Can't see why Toyota would want to go with lug centric for the later models. They're inferior and are more prone to being off-centered. Plus they introduce more stress on the studs since they're now required to handle more vertical load. At least with hub centric, some of the stress is relieved by the hub.