Aussie skypig

The above ^, fitting GT3 rear rotors is pretty cool.
A shame there aren’t any with the same offset, that wouldn’t require a spacer. Still, 7mm seems minimal.
I’d like to match them with some 330mm rears - a 10% increase F&R should keep it balanced.

From what I can see online, stock Cayman S 987.1:
Front
318mm Dia
28mm thick
67mm “Offset” - (Where is this measured?)
130mm BCD (5)
Centre hole 98mm (Have seen another size claimed - haven’t measured mine)

Rear
299mm Dia
24mm thick
67mm “Offset” - (Where is this measured?)
130mm BCD (5)
Centre hole 98mm (Have seen another size claimed - haven’t measured mine)

I’d imagine, that somewhere, there would be a cross reference for this rotors- find some with the same dimensions except bigger diameter (hole centre could be smaller…..I have a lathe, and a Mill….)

Zach L

Running Ferodo DS1.11 on track and stock Cayman R 'sport' pads on the street. 3 years and no issues. Just Sebro slotted rotors, Ferodo DS1.11, and Castrol SRF fluid... that's all you need for even break-heavy tracks unless you're in a full-on racecar with slicks.

Zach L

FYI the video says you need 19" wheels, but I can confirm that 18" OZ Alleggerita will clear those brakes. That's what I ran on my 987.1 with factory PCCB (350mm rotor and a larger caliper).

jim_hoyland

What is the beginning rotor thickness and the minimum for replacement ?

Aussie skypig

F 28mm new 26mm min
R 24mm new 22mm min

Aussie skypig

Great info, and sage advice.
I’m starting to think there would be minimal gains, if any, for my use buy fitting expensive 2 piece rotors.
Adding weight in the form of larger 1 piece rotors, again at minimal gain “goes against my grain”.