Stud Pitch Circle Diameter 5-stud 4.5" (114.NOKINm) Offset - one source has an OEM wheel being measured at 22mm, another states both the MGB and MGC were 22mm. However it's pretty clear from elsewhere that only late MGB Rostyles were 22mm (actually 23.84mm), earlier i.e. while the MGC was in production they were 28.14mm.