Re: Is this speed possible ???
... or you can just velcro your GPS to your gas cap and take it for a ride (running on the internal battery of coarse). I had a cheapo speedo on my bike and wasn't sure it was accurate, low and behold it was dead on when I ran with my GPS in place to check it. So cheapo speedo's can be accurate. I did nothing special with mine, just set the tire size and rode...