Front stub axle caliper lug dimensions?!

[Black Beaut]

Hey Folks,

Looking for a bit of help while the rain keeps coming down here :disappoin

I'm coming up with some plans for a big brake conversion and need to design the caliper adapter, can anyone fill in the dimensions shown in the attachment? I'm pretty sure d is 3.5", no idea about radius r or angles a and b. Any dimension info will be greatly appreciated though.

Once I know these I can dummy up an adapter in wood and hopefully the sun will shine long enough one day for me to dash out and try it all out!

Cheers,

Rob

[panchovisa]

Pull your caliper off. Measure diameter of your brake disk. Measusure tangent from edge of disk to center of mounting holes. 1/2 disk dia. minus tangent measurement equals "r" on your drawing. Find both "r" dimensions (probably the same) and use trig to find angle(a+. Don't think individual angles "a" and "b" that important because caliper doesn't care if it's mounted behind, in front, on top, or underneath just so long as bleed screw is highest part of caliper.

[panchovisa]

Didn't mean to be cryptic, its just that its WAY below zero here (high about minus 38C) and I'm not crazy enough to go out in my unheated garage to measure my struts. Sorry.

[Black Beaut]

D'oh! Thanks mate, now why didn't I think of that, makes perfect sense!

Gonna have to wait another day as it's now cold, dark and wet, still plenty warmer than -38C - ugh!!! Remind me not to visit Minnesota (is that right?) at this time of year.

You're right about the angles as well, not too critical, could be handy to know though as I'm having to mount the new caliper on the other side of the strut so the more info I have the simpler it is coming up with the drawings.

Cheers,

Rob