Reinforced with durable PU rubber surface, the rolling luggage bag replacement wheels never peeled off and rolls smoothly without noise. Smooth rolling wheels provide you a relaxed travel experience. Perfect fit for carry-on luggage suitcase wheels, the replacement wheels assembly can go right in its place. Sturdy and long-lasting replacement wheels for repairing and replacing the old luggage wheels. Specifications: Outer Diameter: 2.36""/60mm Thickness: 0.7""/18mm Bearing Inner Diameter: 0.23""/6mm Bearing Thickness: 0.82""/21mm Short Axles: 1.18""/30mm Long Axles: 1.4""/36mm Material: PU Rubber, Metal Package comes with 30mm and 35mm Axles and washers to meet different needs of 30mm and 35mm. Size: OD50mm x H18mm/ 1.97"" x 0.7"" and Center Bearing internal diameter is 6mm/0.24"". How to installation: Please wear glove and drill out or saw off Roller axle rivet/bolt to Remove old wheel,and then install new wheel with the spare washer and Lightweight Design and Complete Suitcase Replacement Wheels Repair Kits allows for easy installation. Please measure the folllowing data before purchase 1.Old wheel Diameter:Need to check the size before installation. 2.Measure outer width:Outer width of the bracket:it is equal to the inner length of the screw. 3.Inside width: Inside width of the bracket it is equal to the thickness of the new wheel plus the bearing. 4.[For Double Wheel:Measure the thickness of the bracket to select the right Axles] luggage wheel. CHECK THE SIZE PLEASE [Size-Support Single/Dual Wheels] 50mm(OD)*18mm(W) Bearing Wheels-Install Width 0.8in/21mm with 3 Size Matching Axles-axle body length(1.18in/30mm)-(1.38in/36mm)-(1.97in/50mm).