3/4" or 13/16" brake cylinders

[sevenmilebridge]

What would be the difference between 3/4" or 13/16" brake cylinders. Are they interchangeable? Can you use 3/4" in place of 13/16" what could be the difference. I have new 3/4" for a 69 but what was on the brakes was 13/16" is this a problem?

[Habitat.pat]

Good question. I’ll be watching this thread.

When I bought my 67.5 in the late 90’s it had one of each on it so when I replaced them I stayed with 13/16”. My belief is that it would have greater rear brake bias than the 3/4”. Don’t know if that is good or bad, but it has worked fine for me.

Peace,
Pat

[jhayden]

Pat,

Dann's experience seems to go right along with yours:

http://datsun-roadster.com/PIC_PAGES/NE ... 441-03.htm

Jon

[rwmann]

Replaced my 3/4s with 13/16s and never looked back.

[redroadster]

Extremely minor ...bit more pressure with large diameter but bit less travel