300zx front cali. 26mm or 30mm?

[Wykid 240]

How can you tell them apart? I bought them off of someone that doesn't know what year they are from. How do you tell if they are 26 or 30mm?

Thanks,Jeramy

[cdlong]

http://importnut.net/300zxbrakeswap.htm

[Yellow4g63]

The only thing diffrent I see on the 26 vs 30 is on the back. 3 holes vs 2 on the 30 on the top. From the front I can't tell the difference.

[Toddles82]

they all have 3 holes. Outside 2 are for the pad pins, and the middle one is for the pin spring.

THere is a picture that has a tap measure with different numbers measuring the rotor gap width.~30.2mm for the 26mm calipers ~35 mm for the 30mm calipers

[Wykid 240]

they all have 3 holes. Outside 2 are for the pad pins, and the middle one is for the pin spring.

THere is a picture that has a tap measure with different numbers measuring the rotor gap width.~30.2mm for the 26mm calipers ~35 mm for the 30mm calipers

So, measure the gap between the pistons?

Also, is there a write-up on a full 300zx brake swap on a '90 240sx? That's what I have and I would like to know what all I need? I have searched and can't find anything on the '89-'94 240sx swap. . .