Today a mate left his rear wheel with me complaining of a sharp cracking noise which he demonstrated to me while pedalling slowly past me.. they are vuelta deep carbon clinchers and while it spins sweetly, its a rear one and the freehub doesn't seem to have any stiction ..the noise is present under load as i witnessed. i tried a decent mavic kyrsrium and noise is gone... so before i start to dismantle this has anyone any experience of these boyos , i did some googling and i think i can raise spares in the states although bearings should be available here.. freehubs might be a different situation however.. will