The new supercharger from Rotrex, the BID DADDY, C38R-112 requires a unique type of pulley due to the beefed up input shaft and bearing housing.
All the C38R-112 ship with a special pulley hub adapter installed by Rotrex. This special hub adapter must never be removed. This pulley is designed to bolt to that hub adapter using the special mounting bolts shipped with the supercharger.
Size ranges are from 75-110mm in 5mm increments.
They are all 10 rib.
Select the size you want when you place your order.