My 08 Street Glidereads 2.5 MPH fast at 65 MPH...Close enough for me...

 

Here in the UK and I suspect its going to be the same elsewhere speedos are designed to read high. Our traffic cop speedos are calibrated but the standard police vehicles are not, (its a cost thing).

The reasons..............

You cannot sell (again here) a motor vehicle with a speedo which reads low, given that if you change makes of tyre from OEM there may be minute differences which may equate to 1 or 2 mph at speed it is safer and easier for manufacturers to set the speedo just a little high. Just imagine how pi$$ed you would be if you thought you were doing the limit only to get a ticket because your speedo read low.

In fact even our calibrated speedos get out as our tyres wear and we use another system VASCAR which we can calibrate on a weekly basis over a measured mile and set up to be pretty much spot on.

When my old Nissan is doing 70 mph over the road the speedo reads 77 mph.

Newer vehicles tend to be closer as do high end vehicles, which the Nissan definately is not.

WB

 

My 08 speedo reads72 mph.....my GPS reads 69.