Bicycling many years ago was worth reading. I have bikes that only see bike lanes that are swept regularly in very dry Southern AZ and a daughter has fat bikes that are regularly ridden on the Cape Lookout Fat Bike Route along the shore. Wildly different milage. The kids and I calibrate a Park CC-4 or better a Shimano TL-CN42 against a metal tape/ruler for quick checks and then measure when getting close as said above.