Under fairly high pedaling load, my drivetrain makes a loud (and highly disconcerting) "CLUNK" noise. I would say this typically happens 5-10 times during a 25-mile ride. Having replaced my cassette, chainrings, chain and bottom bracket, the problem still persists! This leads me to believe that the source of the noise pertains to a fault with my rear freehub (Hope Pro II circa 2008). I'm not an expert on hubs, so I was wondering whether anyone else has experienced a similar issue?