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Old March 26th 2007, 01:19
alt+f4 alt+f4 is offline
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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
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Old March 26th 2007, 06:12
pantswagen pantswagen is offline
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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
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Old March 28th 2007, 00:31
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Steve C Steve C is offline
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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
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