Sky Mounti Inclinometer for 31.8 mm handlebars

The Sky Mounti inclinometer is one of the most straightforward products in the cycling marketplace: it's basically a carpenter's level, albeit a very small one, for the handlebar of your bike. It will accurately measure the steepest hills you embark on, from 21 to 21 grade. Just tighten it onto your handlebar and you're ready to go no batteries required.