What Butty is trying to say is Roger (at BMW) was explaining the
difference between the new KH/Onza and the old style Onza hubs is the
fact the older ones use a keyway to hold the axle to the flange
cylinder, where the KH/Onza ones engage on the axle splines.
If you have an old style Onza (2004) with a non KH/Onza hub, your keyway
MIGHT be loose & clicking. Its fairly straightforward to diagnose &
repair, basically you need to hold the rim (holding the outside cylinder
of the hub stationary), grab the cranks and try to rotate them while
holding the wheel still. If the cranks move but the wheel stays still,
or it clicks, the keyway is loose. Search on these forums and there are
decent instructions for dismantling and locking the keyway with
loctite.
If its a newer KH/Onza 20", then it sounds to me like its the spokes.
The black spokes have a tendancy to ping when they rub against each
other (larger friction than chromed ones). It'll stop when either a) the
spokes bed in & stop moving or b) the coating wears off where the spokes
touch.
Loose.
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