That is a huge pressure change but it may or may not have caused the problem. If you changed tread patterns, tire size, construction it will handle differently.h8w8in said:Ok , I just went tubeless. It was great everywhere but in the loose sandy corners. I wrecked once from the tire just coming out from under me and almost another time. Its the same trail I always ride at and have never had that problem. With tubes I ran 40psi , and with tubeless I started out at 28psi. I weigh 185 so I thought I would start alittle more on the tire pressure than recommended .I run a Nevegal on the front and and a SB8 on the rear. Any thoughts?