Hello I bought tires recently from McMaster Carr.....O rings ..I purchased red ones ...work well ...good traction ...10 tires for $13.00 +-
So far only added new tires to back ....these are original cars ..assuming yours are the same size ..give,McMaster Carr a call ..cheap and quick,
Cheers Carey
I'm afraid of being able to measure accurately enough. Which size and part number did you order?