Disc Brake Kit for 2022 Grand Design Imagine 2970RL with 4,400 lbs Axles

Updated 11/12/2026 | Published 11/11/2026

Question:

Hello. I’m interested in converting my camper from electric drum to electric/hydraulic disc brakes and I need some recommended kits. My camper is a 2022 Grand Design Imagine 2970RL. My two axles have a weight capacity of 4,400 lbs each. My lugs are 6x5-1/2. My wheels are 15 inch wheels. My brake flange is 4-bolt. Thank you!

asked by: Dennis S

Expert Reply:

Hey Dennis!

Thanks for providing all of the information for your 2022 Grand Design Imagine 2970RL! That's definitely an unusual setup, and I can see why you weren't able to find anything that fits.

Your Dexter 4,400 lb axles use a 6-on-5-1/2" wheel bolt pattern with a 4-bolt brake mounting flange. Typically, that 6-lug wheel pattern is associated with larger 5,200-6,000 lb axles that use a 5-bolt brake flange, so your setup is a bit of an oddball.

Unfortunately, we don't currently have a disc brake kit that matches both specifications. While you could potentially have a qualified trailer shop weld new 5-bolt mounting flanges onto your axles, that wouldn't completely solve the problem. Your Dexter axles use smaller bearings than the typical 5,200-lb disc brake kits, so the new hubs and rotors wouldn't fit your existing spindles.

If you're set on upgrading to disc brakes, replacing the axles with compatible 5,200 lb assemblies would likely be your best option. This would allow you to use a much wider selection of disc brake kits while keeping your existing 6-lug wheels, assuming their specifications are compatible.

Do you happen to have the hub-face and spring-center measurements for your current axles? With those measurements, I can help you narrow down your axle replacement options and see what we have available!

expert reply by: Jerry B

Dennis S.

11/12/2026

It turns out I have Lippert axles, which leaves me in the same situation (no kits available). Can you direct me to how I gather those suspension measurements. Thx!