Electric Powered Trailer for Bicycles 05 July 202105 July 2021 by Webmaster the air funnel for cooling the motor. here is the cooling funnel. The STL is below. motor-air-coolerDownload This is the motor i bought from an electronics breaking yard. its 24v and around 200W. Motor’s 3d model is below if you want to measure its dimensions and fitting. motor 3d model, STL if below. motor24VDownload Pages: 1 2 3 4 5 6 7