Just to let you know I have found a 20 tooth sprocket https://shop.carbondrive.net/shop/rear-sprocket/cdc-fuer-shimano-nexus-surefit-3-lobe.html ! just have to wait for delivery from Germany, will see how that goes then order the pro tool kit ......
Hi all just purchased a Mercedes Smart ebike ( was very cheap, only done 14.7 miles!!) has any one used one of these 'M- Ped-SE - For e-bikes and pedelecs with the BionX drive system' from Pro chip to get rid of the 15mph speed restrictor??