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Thanks Mike. This is really helpful info. My RAM 1500 does indeed have coil springs on the rear axle. It’s a factory air suspension. My trucks tires are C-rated.

Four Wheel Campers referred me to Timber Grove Enterprises. Timber Grove Enterprises are recommending their coil replacement mounts (CRM) rather than air bags because the factory air system in my truck will shutdown if the PSI limit is reached (about 2200 lbs), regardless of air bags. Their CRM springs (45% larger than factory) hold more cubic inches of air than factory, and this effectively lowers the PSI required to support the truck and subsequent load (achieving ~5500 lbs). Here’s a link to the CRMs in case others are interested – https://timbergroveenterprises.com/shop/09-20-ram-1500-factory-rake-stainless-sq6027994

I’ll see what I can find out about the axle capacity and rim capacity as a next step.

That’s good that you’re going with a lightweight FWC pop-up. With a payload rating that low I assume you have coil springs on the rear axle of your Ram 1500. Based on that assumption, I would go with SumoSprings or air bags to keep your rig level. Load range D tires and upgraded wheels would also be the minimum with that setup. Not sure the weight rating for the Ram 1500 rear axle, but most axles have lots of unused capacity. The wheels and tires are always the weak link when it comes to the official GAWR ratings for the front and rear axles. For more information on this important topic, check out this article…

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