Not even close. Speedos are all over the place. Some random experiences from rolling road runs:
- +5mph at 10mph, +3mph at 40mph, accurate at 110mph, -2mph at 150mph
- +2mph at 15mph, +5mph at 25mph, +8mph at 70mph, +3mph at 100mph, +1mph at 123mph
- +20% at 5km/h liner taper down to to +2% at 140km/h up to 285km/h
- -6% at 2mph, accurate at 13mph, +2.5% from 20mph up (aftermarket digital instrument pannel inaccuracies at low speed were cause by vibrations killing off sensor readings)
do you, perhaps, have some physical impairment? And could we have a complete list of cyclists that you want to see 'banned from the road'dellzeqq, you are so wrong on this one, I have just gone outside and stood beside all 3 of our cars and cannot see the speedo easily. Most are set back into the dashboard and would need almost a straight on look to see.
The reason why I did this is because I like to know what I write is correct.
The top 3 cars were with stock tyres, though the one on km/h was tweaked to not read +7km/h all the time (eg. even when stationary). Which gives us an accuracy range of -2mph to +8mph, a fair bit different to 'close to +3mph'.Looks pretty close there? 3mph at 40, 5 mph at 25, what was +2.5 % at 20 mph? the speed showing on the cars speedo is generally more than true speed. If its out badly, I hope you give your customers a printout to save them speeding tickets. Checked mine and it does what I said, your examples must have wrong wheels or tyres or faulty speedos.?