Noticed a knocking noise in the missus' juliana at the weekend.
Happens when she hops the back wheel up and lands, presumably also happens on drops, but harder to hear then.
my first thought was the shock bushings. I've stripped the shock out and there is a tiny, tiny bit of movement between the bolts and the bushings at both ends of the shock, but no more than that which allows the bolt to wobble by a lot less than a millimetre when it is through the bushing. Could this be enough to cause a big clonk noise?
The main pivot seems fine (no play in any direction, as far as I can tell by wobbling with no shock in place) and nothing else is loose (drivetrain all fine, bb is solid and headset is smooth and tight).
I've ordered new shock bushes from tftuned, but I'm not convinced it will fix the problem.
Anyone got any other ideas of things to check? or encouragement that it must be the shock bushes?
Dave
edit: shock is an rp2 which came with the frame, and has never been serviced. could there be something sinister within?
Dave
my guess would be shock bushes.
my nomad made knocking sounds, serviced all the axles/bearings, still knocking sound. replaced bushing - sorted.
The bushes are most likely. There should be no play in the bushes or the pivot at all; the easiest way to check is with the bike fully assembled, if you try lifting the back of the bike by the saddle you should feel no play before the wheel starts leaving the ground. Chance are that only the rear bush needs replacing, as it wears out lot faster than the front.