Originally Posted by pryner
We're considering a new Ram 2500 mega cab 4wd to tow our 5th wheel. All of the ones on the lot have 20" rims and tires rather than the original 18"s. We had to adjust the hitch on our current 2009 Ram 4wd as the camper came into contact with the top of the bed so I am concerned with the 20" tire setup. Has anyone had any experience with the mega 4wd cab? It is a concern or am I worried for nothing?
I do not know about a "new" ram truck, but i do know there have been a number of issues with rams and fords with the 20 and 22 inch wheels and TOWING as most if not all these big wheels are not rated to tow with!!
I have read about rams with 20 being "lowered" to more than half the regular weight because of the rims.
So first and foremost you need to check you towing capacities on the truck with the 20's before you even worry about the bed clearance.
Now if the weight comes in good yes you will most likely have issues with these big wheels as it does raise the truck up, so you will need to see if you really want the truck and it can tow what you want (always try and think future needs) how can you raise up your trailer, you can flip axles, use lighting blocks have new springs made.
This has been a very large and growing issue with all the big three as they have changed their bed heights and they will hit, many people have done a large number of things to fix the issue, just do a internet search and you will find out you are not alone.
Hope this helps some and in the end Happy camping