Hi Mike, I set up my M30 with 38mm Specialized Pathfinder Pro 2Bliss tubeless. I run 34-36 psi front and 38-40 psi rear (On an XL bike, 222 lbs). This was the first of two changes to help with gravel riding (the second being a 36 tooth rear cluster from SRAM). I did notice a much nicer ride on...