"...if you increase the friction 'tween pads and discs you will lock the
front wheels with a lower pedal pressure than before, which means the
rear brakes aren't doing as much work as before, hence lower overall
braking effectiveness..."
Well, I guess that's true, in an emergency braking situation where you
lock up the front wheels - which you should try and avoid doing even in
an emergency, as the co-efficient of friction between the tyre and the
road is reduced when the tyre is sliding, not to mention the loss of
steering ability and the flat spots generated on the tyres.
I would expect that most people considering fancy pads are probably more
interested in responsive and effective brakes when used in a situation
some way short of emergency lock-up, such as when pushing on along a
twisty road. The increased friction area (and/or co-efficient of
friction) should improve this - more effective braking for less pedal
effort. I would also hope for better resistance to fade when the brakes
get hot, with the fancier pads.
Having said all that, I entirely agree with your conclusion, that if you
are improving the front brakes then you should improve the rears too, to
retain the front/rear balance. Remembering to adjust rear brakes
frequently would be a good start to improving them for many of us
(including me)!
Richard & Sammy ('73 Black Tulip BGT, with standard brakes all round, so
I don't really have any authority to blather on about this subject at
all ;-) )
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