In article ,
FMurtz wrote:
So you start out with a speedo dead accurate with new tyres. Then the
maximum error would be 2%. Not 10% as allowed. Things have moved on
since that reg was written.

They start out never true speed reading,they always read less, except
for police speedos in police vehicles.

In years gone by a speedometer was a precision mechanical device. Making
it accurate expensive. Not so with electronics. Even more so when many
makes have a very consistent error.

--
*A backward poet writes inverse.*

Dave Plowman London SW
To e-mail, change noise into sound.