[b-man]

.....for those of you who may be contemplating a swap from stock rear drum brakes to Corvette disc brakes.

The thickness of the Z51 13" Corvette rotors where they attach to the axle flange is .275", the GM 9-1/2" brake drums are only .095" thick.

These rear disc brakes will move the rear wheels out by .180", nearly 3/16". Don't forget to use slightly longer lug studs if needed.

Those of you who are tucking super-wide wheels and tires on the back of your car should know this, sometimes there's very little room to spare. In my case the .180" added thickness is a plus, I was expecting about .125" which would have been fine.

I needed a little bit less wheel backspace and this will put my 6.57" backspace 18X9" wheels within about .020" of their ideal location, it's really hard to get it to work out much closer than this.