yes Karl you're right.. my Guzzi had a blob of disc shaped rust on the front. but it did work rather well..
I seem to remember back then cast iron was thought best for 'serious' bike brakes and shiney stainless drilled for the consumer stuff.. but the undrilled discs wouldn't work in the wet (on a bike) no matter what pads..
In the early 80's Honda introduced a fully enclosed bike disc to try to get around the problem.. didn't work due to lack of cooling.. most bike discs these days are damn near three quarters the diameter of the rolling wheel, some even bolted to the rim, one hell of a mechanical advantage, there's simply is not enough room to do that on a car.
anyway I think the idea of fancy drilled and grooved discs moved from the bike world in which it was necessary, to the car world. in the consumer market anyway.
My standard discs and pads are easily capable of initiating the ABS.. what more can you ask for on a road car.
Gettin' to old for this sh*t
Last edited by seadart; 03-08-12 at 19:32.