Sorry, I am still confused. I was under the impression that you had to put straight metal valve extenders on the inner dual wheels and then curved ones on the front wheels and on the outside duallys. Then put the tire monitors on. The valves (not extenders) on our outside wheels do not allow enough room to put the monitors on them. Then the question is, what degree of angle of extenders do you order, 130, 180, etc. now you see our dilemma. We want to install a tire monitor system but no one can tell us what degree angle of extender to order for our 2012 Sunseeker.