Determining The Correct Capacity Tires For A 12K Keystone 5th Wheel Trailer

Updated 10/24/2022 | Published 10/22/2022

Question:

Im having this issue with Keystone as they provided tires with a total load capacity less than the GVWR. They advise they subtract the tongue weight and use that as their target load for the tires they provide. My 12000 lb trailer has 15inch tires on it. I have replaced 5 tires since I purchased the fifth wheel in April 2021. The spare tire lasted only 500 miles. I put 80lb psi which is the cold pressure rating on the tires. I typically drive 65 mph. thanks and God Bless,

asked by: Andrew M

Expert Reply:

Blowing five tires in a year definitely isn't normal. Taking the pin weight of your fifth wheel into account when figuring out the load range for your tires is pretty common but I'd definitely recommend increasing the load range going forward to prevent these blow outs.

I recommend going with the Kenda ST225/75D15 Bias Trailer Tire # AM1ST97, which has an E Load Range and can support a maximum load of 2,960lbs at 80 psi. These higher rated tires should have no issue handling the weight of your 12,000lb Keystone 5th Wheel.

expert reply by: Kevin C