urq@audifans.com

[Todd Phenneger]

Jim,
  Indeed, I seem to remember doing that on my bike.  I was
messign with some differetn pad compounds and some squealed like
a pig untill I did that.
  Nice hearing from you.  I've been off list for quite some
time. I bought a Land Rover Discovery for a Tow/fun vehicle so I
had to be on that list for a while. :-)
l8r
  Todd

--- Jim Haseltine <jim_haseltine at ntlworld.com> wrote:
> And another reason (well known to pedal cyclists) is to reduce
> brake squeal.
> If the leading edge of a pad touches first it bites and is
> then forced away
> slightly by the turning of the braking surface. The pad then
> skips back and
> bites again only to be forced away again. Result lots of
> chatter and squeal.
> Take a look at a good quality pedal cycle and you'll find that
> the brake
> pads are angled slightly so that the trailing edge touches the
> braking
> surface first. Look at a cheap bike and mostly you'll find
> that the pads are
> angled any which way and the brakes squeal like a pig when
> applied. It's
> rare to find a cycle mechanic who isn't well used to twisting
> brake caliper
> arms.
>
> Regards,
>
> Jim Haseltine
>
> ----- Original Message -----
> From: "Todd Phenneger" <tquattroguy at yahoo.com>
> To: "Tony Lum" <tlum at flash.net>; <quattro at audifans.com>
> Sent: Friday, June 20, 2003 7:31 PM
> Subject: Re: urq at audifans.com
>
>
> > I'm not following why you feel thats not logical.  In ANY
> multi
> > piston arrangement you always want the smaller piston in
> front
> > and the larger in back.  IF you do not you will have uneven
> pad
> > wear across the length of the pad.  You need the extra force
> at
> > the rear of the bad as the front of the pad has a natural
> > tendency to BITE into the rotor and wear faster.  By
> increasing
> > the force on the rear of the bad this evens the wear on that
> > pad.
> >   A simplistic example is the old brakes on Pedal Power
> bikes.
> > I you look at them they almost always wear much faster at
> the
> > leadign edge because of the tendency for the front to BITE
> into
> > the surface.
> >   Additionally, you may notice that some pads have a bevel
> at
> > the front of them to reduce this tendency a little.  Some do
> > not.
> >   Does that answer your question or not?
> > l8r
> >   Todd
> >
> > --- Tony Lum <tlum at flash.net> wrote:
> > > Hi guys,
> > >
> > > The G60 brake caliper has a larger and a smaller piston.
> The
> > > smaller
> > > piston is on the leading edge of the rotor with the larger
> > > piston trailing
> > > on the front mounted T44s.  The caliper is rear mounted on
> the
> > > CQs yet the
> > > smaller piston is still on the leading edge.  Can someone
> > > explain the logic
> > > behind that?
> > >
> > > TIA,
> > >
> > >
> > >
> > >
> > > -Tony
> > >
> > > '80 5KS
> > > 83 urquattro #DA900302
> > > '85 4kq
> > > '87 5kcstq
> > > '87.5 coupe GT
> > >
> > >
> >
> >
> > __________________________________
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>
>


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