It would be interesting to know what percentage of Radwagons are affected by this issue. Upon inspecting the bike, my tires have ribbed sidewalls, the tires seem fine well seated on the rim. I run at no higher than 35psi. Since receiving the bike 4 weeks ago I have done about 130miles with no issues. So I am going to continue to use, on my very flat bike trail daily ride , but with caution.