My RX-8 has 16" rim and small rotors and I would like to put bigger rim and rotor.
I will go for 18" rim and I would like to put Stock Rotor comes w/ 18" wheel.

What would I need to do that?
1. 12.7" Rotors ?
2. Replace Caliper + Pad : ?
3. Any Bracket for install ?

Pls reply me.

Many thanks,
Sam

 

Sam, I would go with 19's. But thats just me. What ever size you pick drop your car or it will sit too high and you will have a larg gap in-between the wheel and fenders. Then you can upgrade the rotors.

 

yes, you'll need the rotors, the calipers/pads, and the caliper mounting brackets at a minimum. Not sure if you can get away with smaller inner brakeshields or not, but most likely you can.

You might also want to consider upgrading to a package from RacingBrake instead of going OE. We run the full-boat 2-pc front BBK and rear rotor package, but their OE size with 1-pc rotors is reasonably priced. You'll get everything you need for the conversion:

http://www.racingbrake.com/MAZDA_Brake_Kits_s/4344.htm