again measurable

By the power of the internet I am again able to determine how far I have been and at what speed I am going after my previous bike computer jumped ship a couple of weeks ago. I've had to guess at what my overall mileage is but it shouldn't be too far off. There's barely room for one complete wheel revolution in the house so I'll have to go to work along a route of known length tomorrow to check that the circumference I entered was sufficiently close to what it used to be.