These Alloy front hubs are designed specifically for the Vauxhall HA Viva 1963-66. They accept the standard bearings & seals, (our kit number PBC 3110) as well as your original brake disks. The wheel bolt pattern is only available as a 4.75” x 5 PCD, Jaguar and Chevrolet and uses ½” UNF studs. This allows for a large choice in after market wheels. Our design keeps the wheel flange in exactly the same place as the original hub. They are sold in pairs and weight 1520 grams each.