Thread: Type of bolt on RRC front calipers ?

My 92 has normal 6 point imperial bolts in AFAIR 5/8.
If yours has 12 point bolts then it will be either Imperial or Metric 12 point socket, so just try both and see the best fit. They are quite close in bigger sizes.
If it is a T type bolt , then you have to buy a set Of T sockets which AFAIR are all metric.
Regards Philip A

I agree with Phillip. Probably just 12-point (double hex) bolts and a standard 12-point socket will fit perfectly.

Thanks Philip,- needed the 'name'. Somehow, "#$%^**" does'nt help...

It turns out that 'T' or Torx is'nt it, but it put me on right track .

Done it again.... would have been cheaper to let a stealer do the job...
$40 for circlips... $18 for Big Tube spanner now $?? for top quality 1/2" 12 point socket, couple of $s for grease, silicon, gloves, rags, Time.....

No wonder Bill Gates is richer than me.

Update:-

P38 wins the chocolates... It is a 12 point head, leastways a 12 sided 1/2" socket is a very close & firm fit. - 13mm threatens to round off the points and 12 mm simply can't be forced on.

The lower one is accessable, but the top one is a bit short on working room.

- I'll try for some close up pics to decide if its a Spline Drive or Double Hex, or something else...

The ones on my P38A are 12-point. I'd expect the RRC to be the same even thought the callipers are of a completely different design.

Pics here... taken with a cheap camera, and of the untouched/undamaged LH bolts...


They are an exact fit, which is the whole purpose of the "12 point" style... Transmits more torque without damage....

Last pic is from Google images of '12 point bolt' which looks the same as the Classic's.


Thanks for the help !

Good pix.

If one traces lines across the flats such that the lines cut off intermediate peaks, one can see the hex.

Originally Posted by superquag

... 13mm threatens to round off the points and 12 mm simply can't be forced on ...

That would make it 1/2 inch double hex then (12.7mm)