Alpine Brake rotor mounting bolt pattern

[Asm109]

What is the mounting bolt pattern on the front hubs to mount the Rotor?
4 on? what thread?

 

[junkman]

108mm

 

[Barry]

108mm

Don't think there were any metric dimensions on Series Alpines. In any case, 4 on 4.25" is the wheel lug pattern, not the rotor-to-hub bolt pattern.

 

[Barry]

What is the mounting bolt pattern on the front hubs to mount the Rotor?
4 on? what thread?

I measured the rotor-to-hub mounting bolt pattern on my S-V several years ago and came up with 4 on 3.375". The diameter of the shoulder where the rotor mounts on the hub was 2.625". My recollection is that the mounting bolts had a short shoulder (the length of the rotor mounting flange thickness) and that the thread size was 5/16"-24.

 

[alpine_64]

Don't think there were any metric dimensions on Series Alpines. In any case, 4 on 4.25" is the wheel lug pattern, not the rotor-to-hub bolt pattern.

While Mark gave the PCD, the measurements are correct the 4*108 and 4*4.25 are the same pcd.

Same as many Japanese cars and MG are 4*4.5 which as a common size is often know. As 4*114.3 ... It's just the 4.25 actually comes out as a nice round conversion

 

[Barry]

What was the question again?

 

[hartmandm]

I believe the OP's questions have been answered. Mission accomplished.

Thanks,
Mike

 

[Asm109]

Indeed it has been answered.
Thank you to all.
Peripheral and tangential discussions included. Thats what makes forums interesting.