Whats the difference between radial and axial?
 

Whenever I do searches for brakes and such i keep seeing Radial mount and axial mount in reference to calipers....I havnt been able to find out the difference. Just a major curiosity for me.


Thanks

Jon

http://img.photobucket.com/albums/v2...03635~original

top axial mount -2 piece caliper -964's -caliper 'lugs'
bottom left radial mount 2 piece -993's -note radial but 4 bolts
bottom right radial mount mono blocks 996's - no bolts hlding them together

the idea of using radial mounts, is if you have stock lugs , you can easily get to the radial caliper, using a 90 degree adaptor

-also the disc position isn't a factor

-ie

you use a hub and disc on a spindle, andyou can make the caliper fit by modifying the adaptor, in the in and out plane, use ful if for example you have a 964 disc, with an overall height of 80mm from hub face to edge of disc
-and you then fit a disc with a 'hat' or total depth of 76mm

-you can simply minus the 4 mm on the radial mount adaptor

Hi

Stock VW calpiers use axial mounts, so the bolt is in line with the cars axle.

Radial bolt callipers are used on late Porsche callipers, think of them like a radial engine with pistons surrounding a crankcase.

Steve