The Roadmaster # RM-1139-140 and # RM-1139-148 are both replacement anti-sway bars for a Ford F550 or F53 Class A motorhome chassis. Both bars are 1-3/4 inches in diameter. The # RM-1139-140 fits models with a GVWR of 22K-24K, and the # RM-1139-148 fits models with a GVWR of 24K-26K. The # RM-1139-140 is no longer available.
You can see installation instructions by clicking the provided links. view full answer...
While very similar the covers are designed for different year ranges of the Ford F-550 like the 2020 model that you have. Since yours is a 2020 the correct one you need is the part # PXQH2001R whereas the # PXQH1002R fits older versions of the RV. view full answer...