Serving Hobbyists for Over 50 Years
The B and G combination is used on the demountable rim. The 30x3-1/2 and the 21" both would use these.
The acorn style nut used on the 28-9 AA trucks.
Tools needed, special era tools used, how to align using a tape measure, front end inspection, proper caster, camber and toe-in of the front end for early and late T's.