I run 40 in treps. When I replace them I will run 42 inch treps. The only bad thing about them is they burp air from the inner bead 3 wraps of good duck tape and your good to go. I’ve had no trouble since just something to keep in mind. I prefer low speed crawling.
I am running walker Evans alum and 40 inch treps and am having the same trouble. What air pressure were you able to run with tape on the 40 inch treps?