"JNugent" wrote in message
...

If you care to re-read the relevant posts, you will see that the
"non-existent" thing is any mention of "spikes" (except by your good
self).
If unicycles have no hardened steel parts (or bits), please accept my
apologies (though I don't think it will be necessary).

Which parts of a conventional bike are made of hardened steel then?

clive