Will Changing Travel Trailer Axle Increase the Trailers Overall Weight Capacity

Updated 04/02/2024 | Published 06/04/2015

Question:

I have a brand new 2015 travel trailer with low GVWR due to the axles used. They are 2800 pound Dexter Axles, part number 4330537. I cant seem to find any information on this part number, but would like to upgrade to a pair of 3500 pound axles if possible?

asked by: Eric

Expert Reply:

We do offer axle beams alone and also complete axle kits that include hub/drums, brakes etc. All can be viewed by clicking on the included link. I also was unable to find a cross-reference for your axle number 4330537. This may be a production code rather than a part number.

You can certainly change out your axle to a higher-rated part, such as the 3500-lb-rated Dexter part # T3584F-EZ-8974, but this will NOT necessarily increase your trailer's capacity. The trailer's frame design and its other features also bear on its ultimate weight capacity. You also want to be sure your hub face to hub face, and your spring center to spring center measurements for a new axle match your current dimensions.

I do recommend you check with your trailer manufacturer by giving them your VIN number to see if the trailer's frame and overall structure will let you get useful additional capacity by changing out the axle. Swapping in a new higher-rated axle will be okay if the axle is the weakest link in the overall trailer design, but this is up to the manufacturer to decide.

expert reply by: Adam R

Dan

3/20/2024

I bent a spindle on my 4400# dexter axle and a shop recommended that since I am replacing the axle I should just replace it with a 5200# axle. It has the same dimensions but adds 12" instead of 10" hubs and thicker steel used in the tube itself (with the same outside dimensions, though). He said the higher weight axle would be less prone to being bent. I don't care about increasing weight carrying capacity, but I don't want to replace another spindle that gets bent from hitting a pothole or curb. Does it make sense to spend the extra money to upgrade to a heavier duty axle in respect to braking and/or durability of the spindle? Thanks!

Jameson C.

4/2/2024

@Dan I would do it just because the 4,400 lb axle is quite a bit rarer than the very popular 5,200 lb axle which has tons of replacement parts made for it which cost less. It would be a bit stronger and less likely to get bent or damaged as well.