My steering wheel spider is 11 1/2" across its all brass but I don't know what year it might be. I thought they were 12 and 13 inches across.
Any help would be apreciated
I've seen fractional variations amongst steering wheels, so I wouldn't hold anything to an 1/8th inch. Here is what I have handy to measure. When you hear steering wheel diameters, it's typically inclusive of the rim.
1910 14-1/8" rim (original) 12-3/8" spider, DB marked
1910 14-3/8" rim (reproduction) 12-1/2" spider, DB marked
1911 15-1/8" rim (original) 13-1/8" spider, DB marked
I've never been able to get a square answer from anyone as to the diameter of NRS steering wheels. Maybe they were a little smaller. There are reproduction wheels out there that are smaller than what I posted above. Does yours have the "Dodge Bros" mark on the underside of the hub?