40 spokes wheel hubs are machined out of billet aluminum and will give the final touch to old school bobbers and custom choppers using spoke wheels. Center fin gives a very distinctive look. These spoke wheel hubs are for 8 gauge spokes (diameter 0.157″ or 3.99mm). Front custom hubs feature 5/16″ threaded holes on both sides; rear hubs feature 7/16″ threaded holes on the left side and 3/8″ threaded holes on the right side. Both spoke wheel hubs are 5-1/8″ wide (130mm). These custom parts for Harley’s come complete with 3/4″ bearings, inner tube and seals.