Correct 3" Axle U-Bolt Kit for the 7k Roadmaster Comfort Ride Leaf Spring Suspension Kit

Updated 09/27/2025 | Published 04/23/2025

Products Featured in This Question

Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers - Tandem 7K Trailer Axles

(160)

$1875.00

MORryde U-Bolts for 5,200-lb to 7,000-lb Round Trailer Axles - Qty 4

(96)

$112.08

Question:

I have a 2019 grand design solitude 375 res-r I want to upgrade the suspension to the slipper spring system with shocks, but Im reading g that spring bolts are needed and I dont see those in a kit, can you provide the part numbers I have dexter 7K axles tandem

asked by: Larry G

Expert Reply:

I sure can Larry! You'll need the MORryde U-Bolts for 5,200-lb to 7,000-lb Round Trailer Axles item # MR66ZR. These u-bolts fit 3" round axles like the Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shock Absorbers item # RM-2460-2570 is designed for.

If you have any additional questions go ahead and throw them into the comment box below and I'll be happy to answer them.

expert reply by: Jerred H

Jerred H.

9/26/2025

Hey Larry, did the MORryde U-Bolts and the Comfort Ride Leaf Spring Kit with Shocks work out for your suspension upgrade on the Grand Design Solitude? I'm curious to know how it went because your experience could help others looking to make similar upgrades!

Larry G.

9/27/2025

@JerredH yessir went very smooth, really the hardest thing was just getting the cribbing in place to support the camper as had to get both axles elevated , I also added the xfactor crossbracing to the suspension with drop brackets as to not interfere with my fresh water drain, also suggest for anyone doing this upgradecto get the corplast tape. You can get it at lowes, as you have to cut slits in and around the spring hangers, and some foam filler in black to fill the gaps