ok, what causes it, bad rims or brake blocks/pads that are too abrasive, or both.
Bad weather and rain is obviously a factor here, but on my geared bikes i have not experienced this problem.
I did a check on the bike after a really wet ride, stripped out the wheels etc and noticed large deposits of rim aluminum embedded in the blocks and aluminium shards deposited around the calipers.
When i say wet, i mean WET ride. I emptied maybe 1/4 pint of water out of each rim after deflating the tyres and removing part of the tyre.
so, what can be done to combat this ?
would ceramic rims be immune ?
would softer pads be better ?
or, is it just crap rims ?