@ragingbike, I have plenty of gos at them, on an almost daily basis, usually at the next set of traffic lights, but thanks for the suggestion.
"how on earth does a bike measure its speed unless it has an on board computer" ... err, if you travel fast, and you kno wif you trave lfast, get an onboard computer. It' snot rocket science.
"Speed limits are for motorised vehicles not bikes" - I know that; didn't I say that? My point was that we want slower & safer motorised traffic; however, too many cyclists think "yayyy, speed is god!". There's a time and a place for *motorised* traffic to travel at great speed. Same goes for cyclists. It might not be law, but so fecking what, it's common-sense.
@rob; "I'll go as fast as the illegally speeding car behind me" is not a justification for your own excessive speed.