Will Replacing Axles with Higher Rated Axles Increase Trailer Weight Capacity

Published 10/04/2019

Question:

7000 lbs tandem trailer axle replacment My axles are bent and I would like to replace them, but would like to increase capacity to 11,000 lbs...can this be done with just replacing with a higher capacity axle?

asked by: Brian

Expert Reply:

You can increase your trailer axle weight capacity by swapping out your tandem 3,500 lb axles for higher capacity axles like ones rated for 6,000 lbs but the trailer axles aren't always the lowest rated component on a trailer. We do have a wide variety of trailer axles that I am linking for you to filter through but you'll need to match the hub-face and spring-center measurements with what you currently have (see attached photo) and you'll need to verify with your trailer manufacturer that upgrading the trailer axles will increase the weight rating.

More likely than not the trailer frame is the deciding factor when it comes to the trailer GVWR (gross vehicle weight rating) so if you increase your trailer axle capacity over the GVWR it won't do anything other than help reduce the stress put on your axles.

expert reply by: Jon G