mikephillips
Donation Time
The thunk is generally the wheels shifting against the hubs due to the space that opens up as the splines wear. Doesn't take much to get that. As noted, greasing and tightening up the knockoffs can sort of stop it, but doesn't correct the cause. Just makes it harder for the wheel to shift against the hub and the grease provides some cushion. As well as eventually runs down the spokes as rotation pushes it out around the ends.