The Duckmeister wrote:With the bike up in a workstand, crank the wheel up to a good speed & let it spin. Place your ear against the frame & use its acoustic properties to amplify the hub noise. Listen for any crunches or other irregular noises over the smooth & constant bearing hum & freewheel whirr.
To add a bit of load, grab a little bit of back brake & hand-crank against the brake drag. Again listen for anything odd, Your hub may have collected a bit of grit or loosened off as it's worn in.
Also check that the wheel is running true & not ticking against the brake pads.
Thanks Ducky.. had a brief look tonight on the workstand. Couldn't hear much, maybe a slight period sound around the hub but not crunching. I couldn't really hear the sound at all on the stand. Spokes all seem good. Pads definitely not rubbing. I'll keep an eye on it. It was quite loud when I was out of the saddle attacking some hills yesterday though.