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Everything Needed for Upgrading a Jayco Travel Trailer's Axles from 3500 Pounds to 5200 Pounds


Hello, I have a 29ft jayco travel trailer with two 3500lbs and load range C tires. All that stuff is +90 loaded with no margin. Axle are bent and I see a money pit $400 alignment.... I want to upgrade axels to 5200lbs not to load the trailer more, just to get margin and load range D tires. I understand the wheels will be upgraded to 6 lugs... Th questions are: -at 5200lbs axles: should it be straight axles since the axles will be loaded to a much lower percentage? -i was going to leave the springs alone. Should they be upgraded or ok to leave alone. My measurements: 86 and 68.5 6x5.5. Do the axle clamp on the springs in 1 location or will this require another alignment. Any axle brand you recommend from your stock? Thank you for your help.


Expert Reply:

Upgrading your axles to 5200 pounds is possible, but there's a lot more involved than just that and the wheels: You will need to upgrade your suspension (leaf springs) and your brakes.

For that reason, I recommend going with one of our Timbren Axle-less systems. They act as the axle and the suspension, and they work independently which reduces the odds of uneven terrain affecting the entire axle.

The 2" Lift Spindle w/ Brake Flange - 5,200 lbs, part # TASR5200S05, has the 5200-lb capacity you were looking for and provides a 2" lift, giving better ground clearance.

For the hubs and drums, I recommend the Dexter Trailer Hub and Drum Assembly - 5,200-lb E-Z Lube Axles - 12" - 6 on 5-1/2, part # K08-201-98. The hub, drum, bearings, races, and seals are all included. They are a 6 on 5-12" bolt pattern. They have the E-Z-Lube feature, making greasing everything much easier.

For the electric brakes, I recommend the Electric Trailer Brake Kit - Self-Adjusting - 12" - Left and Right Hand Assemblies - 5.2K to 7K, part # AKEBRK-7-SA. They fit the hubs and axle above and have the Self-Adjusting feature, further making your maintenance easier. They fit 14-1/2" to 16-1/2" wheels.

Finally, for the wheels and tires, I recommend the Westlake ST225/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 6 on 5-1/2 - Load Range E, part # LHAW124. They are load range E, so they are able to support the 5200-lb axles (load range D wouldn't be able to).

With all of these together, it's quite possible that you could increase the entire capacity of your travel trailer. Of course, you need to contact Jayco to ensure that the frame can support the new weight since if it's limitations are less than 5200 lbs, you'll need to go by that (i.e. the smallest number).

I've linked to video reviews of the products above.

expert reply by:
Kef G

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