I can almost guarantee you your Red springs will "settle down", or "break in" after awhile. How much? I don't know. I had the same issue on the ET410 with the TKR7245 Yellow 2.82 rate springs trying to get a 27mm ride height. The only way for me to get the ride height I wanted and have the springs touching the adjustment collars was to use the Green springs. That's okay for me, and my situation as I run on a rougher track/terrain.