Originally posted by Stor Mand
Why is it frowned upon (by some) to have a mirror on ones bicycle?
I think Oscar nailed it regarding the bike mounted mirror. The racing/wannabe community eschews anything that adds weight or wind resistance. The difference is niggling for more general riders, but if you're paying upwards of $25/gram to shed weight, adding a mirror would be out of the question. Those who actively disdain glasses and helmet mounted mirrors probably do so out of fashion conciousness or machismo.