[wuga]

Did this a couple of years back. I'm 6' and 240 lbs, so I was having difficulty getting in my 1931 RPU. I installed a 15" 1940 steering wheel from Roadster Supply. Made quite a difference. The hub is a keyway but slightly different taper, a half round file took care of that. In order to use the center controls required trimming the steering column cover behind the wheel and grinding off the back of the wheel. This wheel comes with a standard horn button but the original 1931 can be adapted. I looked at reducing the diameter of the original wheel but wasn't keen on rebuilding the rim from new epoxy. It would be great if someone came out with a 15" Model A wheel. Another thing, if you think the steering is heavy with an 18" wheel, wait until you install a 15" wheel. I installed a Randy Gross steering box to alleviate the problem and all is well.
Warren