Bought for a Class A motorhome with 19.5" wheels. The 4 brackets included that hold the ends of the air expanders were too small for an impeller of this size. The bracket that fits over the wheel stud had to be tapered to prevent the stainless steel lock nut from threading onto the stud. One possible solution was to create a new crease in the corner of the bracket to allow the locking nut to thread onto the stud. but then the brackets would be too short for the length of the air extensions. the supplied air extension hoses as well as the fender retaining nut issue mentioned above. Wanting to complete this project as quickly as possible, instead of returning the item to the seller, I cut the ends of the caliper wheel studs and riveted them to the center hub of the fender. This step probably added 3 hours of work, which would not have been had the brackets been the right size to thread the wheel arch locknuts onto the wheel studs. The air expanders have been in place for a week now and the tire pressures remain stable meaning no air leaks which is good. Overall, the extensions work great and are of good quality! Now I can easily check the air pressure in the twin tires and simply inflate them if necessary.
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