Speedometers can be inaccurate for many reasons, Peace. For the reason if the speed of a drver over the limit here in the UK is within 10% + 2MPH (Ie 30=35, 40=46 etc) then no-one will press. What does make me laugh is that people think this is an invitation use the the leeway instead of the limit. Just imagine that your speedo is measuring 'light'. It shows 30 when you are actualy doing 35. You think you can safely do 35 but that is actualy > 40. Then people wonder why they are fined! Incidentaly in a recent test of a large number of different cars it was found that at low speeds the speedo did consistantly measure low while at higher speeds it measured high. You wouldn't think it was rocket science to get it right but it is apparantly a constant puzzle to the motoring trade. I must test mine one of these days - I can compare the speedo to my hand-held GPS!

Cheers

DtG