you can remove the speed limit on most mid drives with a dongle if my bike was locked to 15mph id throw it in the canal but it will mean less range at faster speeds.I just want one just to take away on back of motorhome as my wife has just purchased one. I find them slightly frustrating as I cycle around 150 miles a week with a local club and find 15.5mph on the slow side but I will only be pleasure cycling with my wife as a means of transport.