Grant Tuff Wheel in my 67 Dart...

The term "rimblow" is used loosely now and is oftened confused with Tuff wheels and rallye wheels. A true rimblow is a steering wheel that has the horn button in the rim of the wheel so to blow the horn you squeezed the rim. Hence the term rimblow. As far as I know only E-bodies actually were available with a rimblow wheel. Some Fords had them too but both wheels (Tuff and rimblow) have very little dish and therefore need the spacer to put the wheel back in the correct position and provide room for your hands between the wheel and the turn signal lever.