MAJ Mike:
Still believe I'm correct about WWII German move toward steel tires on their tanks. Doesn't really explain why the Soviets used them on later models of the T-34. I appreciate the eduction. Thanks!
The Soviets did not use all steel road wheels on later models of the T-34. Especially the T-34/85, I have looked thru scores of photos trying to find them but have not been able to. 1941/42 were the critical years for rubber shortage for them. But the all steel road wheels caused bad vibration problems and by late 1942 a mix of rubber rimmed and steel rimmed roadwheels was the norm. By 1944 new production T-34s had all rubber rimmed road wheels again although rim types varied, solid or spoked with lightening holes. Now their Heavy tanks such as the IS series continued to use steel rimmed wheels, but a SWAG says that they did not have the speed for the vibrations to become an issue as on the T-34.