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2019 Grand Design Imagine 2600RB Travel Trailer Suspension Wheel and Axle Upgrades

Question:

I would like to replace the axles 3500 to 4000# axles - springs and hubs also go to a wider rim for heavier ply tires 205 to 225 rims I’m curious about the clearance from top of tire to trailer so all this change would require the trailer to ride higher I’m gonna need help to find what would fit in the existing spring hangers etc. the current axles and springs and tires are to light for this trailer and all the undercarriage needs upgraded

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Expert Reply:

I would be happy to help you upgrade your 2019 Grand Design Imagine 2600RB Travel Trailer's axle's suspension and wheels/tires. Keep in mind that replacing your axles will not increase the GVWR of your trailer. You will still be limited to the lowest rated component which will be your trailer's frame.

Lets start with some new axles, you will need to measure your current axles from hub face to hub face and from spring center to spring center to determine the correct length of your new axle. I have linked a picture to demonstrate the measurements you will be needing to find. Just for an example we'll use the Dexter Trailer Axle Beam with E-Z Lube Spindles - 89" Long - 5,200 lbs item # 8327820 measures 89" from hub face to hub face, and 74" from spring center to spring center as shown in the included diagram. This axle has a 5200lb weight capacity and will definitely be an upgrade from your current 3500 lbs to 4500 lbs capacity axles. We also have the same Dexter axles in an 86 1/2" length item # 8327816 and 95" length item # 6340624.

For your upgraded hub and drum assemblies I recommend the Dexter Trailer Hub and Drum Assembly - 5,200-lb E-Z Lube Axles item # 8-201-5UC3-EZ. These hubs are rated for 5,200 lbs Axles and have a 6 on 5-1/2 lug pattern to go with your larger wheels. They fit inner bearing item # 25580 and race, outer bearing item # LM67048 and race. Each preassembled kit includes grease seal, grease cap, and all lug nuts.

A 205 tire is 27.1 inches tall and a 225 tire is 28.4 inches tall. The 225 tire has higher capacities but usually people go to the bigger size when they need more capacity than what the 205 offers. I recommend the Kenda Karrier ST225/75R15 Radial Tire with 15" Hi-Spec Aluminum Wheel - 6 on 5-1/2" - LR E item # AM32684. it has a 81 mph speed rating and a 1-year worry-free guarantee. If within the first 12 months the tire is damaged in any way, it will be replaced at no charge. It's weight capacity is 2,830 lbs at 80 psi per tire.

The double eyed leaf springs you were looking at item # SP-212275 are 25 1/8" long but are rated for 3,500 lbs axles. Sticking with this size of spring I recommend the 4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/8" Long
Item # SP-221275. These leaf springs will accommodate your new axles size and give you a smooth ride. You will need to measure your current springs to ensure that 25 1/8" is the correct size. You will want to jack your trailer up, remove the wheels, and measure the springs with the tension off of them. I have attached a picture detailing what you are looking for. You will need these dimensions to utilize the 4-Leaf Double-Eye Spring for 6,000-lb Trailer Axles item # SP-221275. If your leaf springs are a different size please email me with the correct measurements and I will be glad to make a recommendation.

A-12-9/16"
B-13-3/16"
C-25-1/8"
D-3-1/4"

You're going to want to replace your equalizers as well. I recommend measuring the equalizer from center of front hole to center of the back hole so we can determine which one you'll need.

The Dexter E-Z Flex Suspension Kit item # K71-652-00 will feature an upgraded equalizer that will reduce road shock in the suspension system. This kit will work if you currently have a 5-3/4" equalizer. If your Imagine has the larger 7-11/16" equalizer, the Dexter E-Z Flex Suspension Kit item # K71-653-00 is the kit that you should use.

I have included multiple videos and reviews on the products I have recommended.

Dexter Axle Dimensions
Dexter Axle Dimensions
(click to enlarge)
Spring Measurement Diagram
Spring Measurement Diagram
(click to enlarge)
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Jerred H

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