The two e-bikes I have both need back tires repaired! I purchased the back tire for the grey bike and the back tire on the white bike needs a patch and a chain! Other than this both bikes are in great condition to ride! The white one goes up to 20 mph and the grey one goes up to 28 mph! I have replacement tire for the grey engwe! Usually cost about $50 to get tire fixed at the Village Cycle in the villages!