From a previous customer we spoke with we found that on the Ram Promasters like your 2018 model the distance from the bottom of the hitch opening to the bottom of the door when swung out measures right at 9-1/4 inches. So based on that info we know that the Yakima Backswing pivoting hitch adapter part # Y02483 would work well for you as it would fit under your door clearance and would also allow your rack to pivot out and away like you are wanting. view full answer...
I don't have a 2019 Ram Promaster 2500 in front of me so you're going to need to take a measurement of yours to confirm that the Roadmaster Spare Tire Carrier item # RM-195125 won't block the doors when connected to the etrailer Hitch item # e99AR. The top of the receiver sits 2" below your Promaster's rear bumper. You'll want to open your door and measure from 2" below the bumper to the bottom of your door. If this is less than 7-1/2" you'll have plenty of clearance.
On the Roadmaster... view full answer...
The Curt TruTrack Weight Distribution System # C17499 is going to be approximately 12" from the hitch pin center hole to the center of the ball shank hole. The exact measurement will vary between vehicles as the head of the hitch is adjustable for pitch making this measurement change depending on its adjustment.
If you are needing the hitch ball to be further away from your 2017 Ram ProMaster 2500 you can use the Equal-i-zer Weight Dist Shank # EQ90-02-4600 to gain an additional 6" from... view full answer...
I have attached a drawing showing the dimensions of the drain hole location. It is 6-1/2" from the closest edge and centered 16" long ways, and the hole dimension is 2". I would recommend the JR Products # 3729495-211-022 chrome plated drain with strainer to add to this installation. view full answer...
The 176 lbs weight capacity for the Rhino-Rack Heavy Duty Square Bar Roof Rack, part # RB1800B-2, that you referenced reflects both of the crossbars combined. view full answer...
According to Airexcel, the manufacturer of MaxxFan, their # MA49FR replacement roof flange assembly is compatible with their # MA00-07500K 7500K MaxxFan deluxe fan.
I've provided a drawing showing the dimensions of the flange as well as a link to an install video for the # MA00-07500K fan. view full answer...