Just had my wheels changed from 14' to 13' Avon ZZS 185/55 R13 fronts & 215/55 R13 rears Caerbont speedo 0 - 160 MPH Does anyone know the correct PPU code the pick up is via a ford sierra gearbox electronic sensor The speedo has been checked by the Caerbont its working correctly. Any help would be appreciated. Jon