Speedo

[IAN MAC]

Looking for any info you all might have about recalibrating a speedo. I'm reading approx 10 % over. Believe its had a dash change, and who knows, possibly the gearbox too. Any help appreciated.
Ian...

 

[television]

I dont think that has ever been asked Ian, the rear axle or wheels are the main things that can alter it other than the speedo its self, at what speed is it 10% out

 

[jberks]

They are built to read 10% over. Any more that 10% is illegal. They are also not allowed to underread but 10% over isn't that unusual. Also new tyres will help.(greater rolling diameter).

 

[IAN MAC]

The 10 % over is all through the range, may be over 10 %, first noticed it when i reset the trip meter over a journey i know the distance of. Never had anything reading so far out before.