Does that mean that if the odometer says I've done 4,000 miles I've only actually done 3,600? With limited mileage insurance that's a bind.
Having said all that, I think the M3W speedo is more accurate than the one on my Aero 8. I'm pretty sure they can be re-calibrated but - actually - I don't care and can't be bothered to do it...
Can the M3W be re-calibrated just like the Aero 8??