Generic 8mm Speed Washer Speed Ring for Skateboard Longboard Trucks 4 pc Set Includes 4 axle washers from Dimebag Hardware Speed washers increase speed and promote longer bearing life by reducing friction between the bearing and axle nut and hangar These washers are the standard size and will fit on all skateboard/longboard trucks that have 8mm axles (virtually every truck has the standard 8mm axle size) The 4 washers included are enough to outfit 1 skateboard truck