Tom do you ride alot in dusty/muddy conditions? it may help to wipe the rims and pads with some nailpolish remover or alchol oncein awhile to get gunk off them alos some emery cloth on the pads to get and glaze of them. I have never been able to keep any cantilever brakes on my bikes from squealing but they really stop well *giggle* OH I didn't see anything about tires? are you tires really fat? is the squish from them?
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk