what hub is everyone using? Cause when i had the old T-mag hub (same as the t-master hub, but it silver, with the same sealed baerings) when i rolled along, it sounded like my freewheel was fooked, so i greased it n stuff, n it still donw it, checked frames for cracks but none, but then i took the rear wheel out, and took the bearings out and just whacked lots of grease in the hub and put it all together again and it stopped creacking. maybe its that? Or maybe your chain is took tight? causeing the freewheel to be cluncking (done on mine before...) Or maybe you need a new FW or to re-grease the current one?