DT Swiss HX 531 Rim - 27.5", Disc, Black, 32HWhen you head into the unknown, the HX 531 with its 30mm internal width is the perfect choice. With an ideal position in the middle of the strength, to weight, to width range, it works with many tire sizes and is the ideal choice for all eMTB's meant to be ridden on proper MTB terrain. 30mm internal width Product Specifics Rim Width (Internal): 30 Defined Color: Black Wheel Size: 27. 5" Color: Black Designed for ebike: Yes keyword search: electric