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Discussion Starter · #1 ·
Hi all,

I did my search before posting.
I am trying to find the piston diameter of rear OEM brake caliper's piston size.
Does anyone know this information? I have the piston diameter of the front, but rear is still unknown. Nowhere to be found here and google.

If you know please help out. Thank you.

Regards,
Sam
 

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Discussion Starter · #2 ·
GT-R OE rear caliper piston size

Well, seems like no one has this information.

When I changed into ATS' Big Brake System, I took NISSAN OE calipers out and measured them and post the info here just in case anyone needs it.

Front caliper
6 pistons total
3 piston per side
#1 32.5mm
#2 30.5mm
#3 26.5mm
Total piston surface area is 42.24 cm^2

rear calipers are 4 pistons same size overall.

piston diameter is 26.5mm

Total piston surface area per caliper is 22.06cm^2

Sam
 
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