My Rancher has a speedo. I was surprised at everything on the display considering the last time I rode an ATV was around 1980 on an ATC 110. Japanese motorcycle speedos have historically read high in stock configuration, with the ones I've owned reading from 4% to 7.6% high while the odometers are normally spot on. I've heard of some reading 10% high. Do ATV's tend to have this "safety margin" built in to their speedos? I only have GPS on my phone and don't particularly want to get out on the road and find out. The phone needs a steady speed for a good length of time to get an accurate reading.