These hub centring rings act as spacers that provide an additional cushioning layer, contributing to a smoother and more stable driving experience. Includes 2 pieces of hub centring rings for wheel bore center alignment. Outer diameters: 60.1 mm, 73.1 mm, 72.6 mm. Inner diameters: 57.1 mm, 56.1 mm, 64.1 mm. Material: aluminum alloy (forged). Made of forged aluminum, hard and durable, not easy to scratch, not easy to carry, and with a long service life. The hub ring fills the gap between the vehicle hub and the centre bore of the wheel. Designed to eliminate unwanted steering wheel vibration. Benefits and why you need it - Improves alignment between hub and wheel bore to reduce vibration and improve stability. - Helps ensure proper centering when mounting wheels, leading to a smoother driving experience. - Durable forged aluminum construction for long service life. Compatibility and sizing - Includes 2 pieces with multiple bore size options: outer diameters 60.1, 73.1, 72.6 mm; inner diameters 57.1, 56.1, 64.1 mm. - Designed to fit wheels and hubs that match the listed outer/inner diameter combinations. Use scenarios - Upgrading or changing wheels where the center bore sizes require a spacer to achieve proper hub alignment. - Replacing worn or mismatched rings to reduce steering wheel vibration on highways or rough roads. - Vehicles that rotate or swap wheels frequently, where a consistent centering fit improves driving stability.