The overall dimension of the wheel diameter width is 150mm 24mm5.9 0.94, the inner diameter of the central bearing is 8mm0.3 and the length of the ale screws is 75mm2.95. Please check the detailed dimensions in the third picture before purchasing The package includes 2 gray front spare wheels, 2 ales, easy and convenient installation without complicated steps, saving time and effort. Made of highquality and environmentally friendly rubber material, this solid replacement wheel set is nonslip and dustproof with strong wear resistance and load capacity. Widely applied to disabled vehicles, healthcare vehicles, etc., compatible with most wheelchairs, walkers, walkers or other replacement accessories with 6 inch wheels. This replacement front wheel set will provide a quiet, smooth and easy ride on all surfaces, suitable for indoor and outdoor use, economical, practical and longlasting to use Choose c and 6 inch rubber brake set for wheelchairs, rollators, walkers and replace them easily and conveniently by yourself Specification Material Solid Rubber Color Grey Overall wheel dimension Diameter Width 150mm 24mm 5.9 0.94 Inner diameter of the central bearing 8mm 0.3 Distance between bearings on both sides 40mm 1.57 Ale screw length 75mm 2.95 Total weight 700g Package includes 2 6 inch black spare front wheels 2 ale screws