I've often read discussions about the best bit of kit that you've bought for your bike/cycling but never a worst equivalent so I'll start one off and see if anyone adds other stuff might come as a surprise but the worst bit of kit for me was a pair of Castelli bibs. Nothing wrong with the fit or chammy but after a few months, after a post ride wash, I hung them on the line and noticed a white fleck on the legs . Took a photo and sent it to Castelli and asked for any thoughts/advice and all I got back was 'nothing to do with us' . Cos it looks so unsightly they've now been demoted to turbo shorts but the white flecking has spread over both legs so they are the worst bit of kit I've purchased