S someone Member Aug 15, 2010 #1 Me and my friend are going to start bike riding to lose weight, but how do we know how fast we are going? We don't want to be going too slow... like i want to know the mph we are going my bike doesn't have a speedometer :/
Me and my friend are going to start bike riding to lose weight, but how do we know how fast we are going? We don't want to be going too slow... like i want to know the mph we are going my bike doesn't have a speedometer :/