So I got my cyclocomputer setup today and took it out for a trip. I was headed down hill and my comp showed I was doing 39mph and I am not sure if thats right. It was a fairly steep hill and I was moving very fast so I was some what confused if it was correct or not. Also the settings were all set correctly for my tire size and its wired so should be no interference.

So is 39mph to fast to be true or is that a regular speed for a down hill run?