1: Bontrager Corvair rim: The LBS tells me this rim is "concave" - WTF is this, and what's wrong with it if it is as he says "concave"?...
2: Bontrager Corvair A-Sym rim: The rim is losing shards of metal everyday, very fast, very big, very badly. It is affecting my braking. The LBS gave me new blocks to try, and I told him to #$@% off. Any ideas what is casuing this? My rims are always kept clean. BTW, the A-Sym is only 1.5 monthys old, and I didn't have this problem with the old A-Sym before it.
Concave means concave. Look up the word ina dictionary.
You should replace the brake pads as most likely they are causing this. The shop was right to tell you to replace pads, but seems you were nasty with them.
well by concave, i'm guessing they mean the rim is at an angle. maybe to allow for thicker tires while having a thin wheel.
this will make a difference as you'll have to adjust your brake pads so they touch the rim head on, and not at an angle. if your previous rims weren't concave then you'll havbe to change the angle of the pads.
as for the guys at the shop, maybe they made a mistake, but that's no reason to refund or exchage the rims. you didn't have to take their advice. personally, trusting someone who has been working all day and who doesn't reallly care what happens to my bike is not an option.
i only take their advice if i know them personally. like someone who you go to regularly.