Description: - Made of high quality aluminium alloy wheel hub - high strength, sturdy and lightweight. - Professional design for folding bikes. - Suits for folding bike modification, walking/ parking wheel. - bearing , very smooth and for long time serving. - Comes with mount screw for easy and convenient install.Specification: - Material: Aluminum AlloySize Chart:Size:Diameter: 6cm/2.3 inchRubber Width: 15mm/0.59inchPackage Includes:1 Pair leichtes RadNote:Color might be slightly different due to the color calibration of each individual monitor.Please allow slightly measuring deviation due to manual measurement.