OnTheTrail
Rock Crawler
I get what you say here and appreciate the idea however the insulation tape is actually providing more resistance than the polished or machined surface of the internal bead ring.
Okay got it. Thanks for clarifying. Is there a lot of open area between the outer sides of the foam and the inner sides of the tire side wall? I think I recall seeing a company that makes inserts (looks like little discs) that you stack to make up an void space on the inner and outer sided of the wheel foam.
Next question, do you have a complete other set of tires/foams/wheels to experiment with to see if it happens with those?