D DKFan Retro Guru Today at 16:50 #1 https://rotorbike.com/en-uk/uno-electronic-mtb-upgrade-kit.html looks interesting-suitable for 10 speed+ cassettes so almost retro fit
https://rotorbike.com/en-uk/uno-electronic-mtb-upgrade-kit.html looks interesting-suitable for 10 speed+ cassettes so almost retro fit
