The overall dimension of the wheel (diameter x width) is 150mm x 24mm / 5.9 x 0.94, the inner diameter of the center bearing is 8mm / 0.3, and the length of the axle screws is 75mm / 2.95. Please check the detailed dimensions in the product images before purchasing. Package includes 2 gray front spare wheels and 2 axles. Easy and convenient to install without complicated steps, saving time and effort. Made of high-quality, environmentally friendly rubber material, this solid replacement wheel set is anti-slip and dustproof with strong wear resistance and load-bearing capacity. Wide application for mobility devices such as wheelchairs, walkers, and other equipment requiring 6 wheels. Compatible with most standard models. This front wheel replacement set provides a quiet, smooth, and lightweight ride on all surfaces, suitable for both indoor and outdoor use. Economical, practical, and built for long-term durability. Choose this 6-inch rubber wheel replacement set for wheelchairs, rollators, and walkers. Designed for easy self-installation. Specifications: Material: Solid Rubber Color: Gray Overall Wheel Dimension (Diameter x Width): 150mm x 24mm / 5.9 x 0.94 Center Bearing Inner Diameter: 8mm / 0.3 Distance Between Bearings on Both Sides: 40mm / 1.57 Axle Bolt Length: 75mm / 2.95 Total Weight: 700g Package Includes: 2 x 6-inch Gray Front Spare Wheels 2 x Axle Screws Our products are made with high-quality materials designed to deliver reliable performance. Orders are typically shipped within three business days. Estimated delivery time is 8–15 days. Please carefully review the product title, images, and specifications to ensure compatibility with your needs. We want you to be satisfied with your purchase. If you have any questions, feel free to . We’re here to help. Thank you for choosing our product.