What Is The Difference Between Roadmaster Comfort Ride RM-2460-2570 and RM-2460-2580?

Question:

Please help clarify. The descriptions of the Road Master RM-2460-2580 versus the RM-2460-2570 seem to be worded differently. Please confrim the 2570 is a total of 7k lbs per axle and the 2580 is 8k lbs per axle. The descriptions mix up per axle and per spring in a confusing way. Id like to order today, but would feel better with some clarification. Trailer is a 2021 Grand Design Solitude 3740bh with Dexter 3inch axles Thanks!

asked by: David B

Expert Reply:

I would be happy to help!

The Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers - Tandem 7K Trailer Axles # RM-2460-2570 is for trailers that have 7000lb tandem axles, and use springs that have a 3500lb capacity each (one spring on each end of the axle).

In contrast the # RM-2460-2580 is for trailers with 8000lb tandem axles, and uses springs that have a 4000lb capacity each (one spring on each end of the axle).

Now both 7000-8000lb axles are 3" in diameter, but I was able to confirm your 2021 Grand Design Solitude 3740BH has 7000lb axles so you will want to go with the # RM-2460-2570. Going with heavier rated springs can cause a stiffer ride so you will want to stick with springs rated the same as your axles.

This will be a fantastic upgrade for your trailer which will give you a much smoother ride, and make towing the trailer much more enjoyable.

I included videos of the products mentioned for you to take a look at.

expert reply by: Samuel C

Rusty C.

3/19/2024

Hi Samuel. I've got a 38' Heartland Torque 5th Wheel Toyhauler. Broken leaf springs have already been an issue. Right now I have 6 leaf leaf springs under there (started with 5). The Trailer is 16k lbs. I see you mention a rougher ride with the 8k springs, but for a trailer this big (tandem axle), could it be a benefit to use the larger 8k unit versus the 7k unit?

Mike L.

3/20/2024

@RustyC You really will want to use springs that are appropriate for the weight of your trailer, but some RV manufacturers equip with OEM springs that cover the GVWR minus the RV's pin weight. If your OEM springs were 7K, it would make sense to upgrade to the 8K, Keep in mind though, going with the higher rated springs won't increase the GVWR of your 5th wheel.