Are you sure the drop center rims are intended for a bias ply tire? They may well be for a radial 20" tire.

The Coker website has little information on the drop center, but I would guess they are for a radial tire.

Tad


1946 Chevy OS 1.5ton, 1955 GMC 3100, along with other various IH,Ford,Nash,MGB,.....