What width are the RIM's? 06 February 2019 11:42 Updated Follow For both our 26" wheels and 28" wheels, the RIM width is as follows: Internal width: 20mm External Width: 24mm Related articles How loud is the Swytch motor? What is the total weight of the 250w systems? Without the Swytch power pack how much weight is left on my bike? What is the weight of the 250w motor? What are the Swytch power pack functions?