The overall wheel dimension (diameter x width) is 150mm x 24mm / 5.9 x 0.94, the inner diameter of the center bearing is 8mm / 0, 3 34; and the axle bolts length is 75mm/2.95. (Please check the detailed dimensions on the third photo before purchasing ) Package includes 2 gray front spare wheels, 2x axles, easy and convenient to install without complicated steps, saving money your effort and time. Made of high quality and eco-friendly rubber material, this set of solid replacement wheels is anti-slip and dust-proof with strong water resistance. 39;wear and load capacity. Wide application on handicapped vehicles, healthcare vehicles, etc., compatible with most wheelchairs, walkers, rollators or other replacement accessories with 6 34; wheels. This front wheel replacement set will provide a quiet, smooth and lightweight ride on all surfaces, suitable for indoor and outdoor use, economical, practical and long lasting. term to use Choose this 6 inch rubber wheel replacement set for wheelchairs, rollators, walkers and replace them easily and conveniently by yourself Specification: Material: Solid Rubber Color: Gr ey Overall wheel dimension (diameter x width): 150mm x 24mm / 5.9 34; x 0.94 34; Center bearing internal diameter: 8mm / 0.3 34; Distance between bearings on both sides: 40mm / 1.57 34; Axle bolt length: 75mm / 2.95 34; Total weight: 700g Package includes: 2 x 6 inch black front spare wheels2 x axle screws