I don't know/remember the brand. They were pretty worn. One of them was in bad shape. I attributed the first flat to that so replaced it. The new tire also experienced a few flats. The side walls were in good shape, it was the contact surface that was decayed.
I think I'm past the bad part so should not have the issue until I get the one field out of CRP. That particular field is restricted to "Native Growth" or something like that. I just had a meeting with the CRP folks (they call you in to review the plan) and that field is not supposed to have cedar trees. I asked if I could cut them and was told "No, Native Growth until the end of the contract". She also said I would be required to remove the cedar trees if I wanted to re-new the contract. Frustrating but it is what it is.
When it comes time to cut that area, I'll probably hire a guy with a bull dozier.