FWIW if you follow the ST thread, Tom A thinks there may have been inconsistent batches of tires, and he recommends the compass snoqualmie pass which has the same construction as the bon jon in a 44c. My experience with schwalbe marathons is even if they roll comparably, they are awful to actually ride on and had to be run at least 10psi lower than anything else of a similar width to even be bearable