I thought I'd check the rear shoes for wear. I have had a few strange noises, not quite a classic brake squeal, a little deeper. The shoes look like they have 80% on them, compared to the new EBC shoes I bought in haste. I have read a few reports on the OEM pads being really, really hard. I don't see any damage to the hub ( bike has only 23,000 miles) Should I change the shoes for the new EBC's or take a wire brush to the hubs and rough them up a bit.