If y'all haven't seen it yet we have some decent info on wheels and options as a Tech Tip here on the Stovebolt page
http://www.stovebolt.com/techtips/wheels/

And here's a cross section of an actual RH5 rim
https://picasaweb.google.com/lh/photo/96LV_PnM-bC97_4AoWK_G9MTjNZETYmyPJy0liipFm0?feat=directlink

And here's an excellent use for an RH5 wheel
https://picasaweb.google.com/lh/photo/pDx64DMDE_WJrg-ZpgH_8dMTjNZETYmyPJy0liipFm0?feat=directlink

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-