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What is the Difference Between Load Range B and C Trailer Tires


Besides the number of plies and load rating, what else separates the B and C rates tires? Are C rated tires generally harder than B rated tires? Do C rated tires last longer than B rated tires? The tires I purchase will be used for a boat trailer with 8inch X 3 3/4inch wheel rims


Expert Reply:

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same size but it will not increase the capacity of the trailer.

If you go with tire # AM10004 it is rated for 745 pounds at 90 psi. And tire # AM10002 is rated for 590 pounds at 60 psi. Both tires will fit 8 inch x 3-3/4 inch wheels. I have included a link to our help article on tires for you.

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Follow up Questions

Steve Q.
Would there be any benefits to go from a 4.80 x 8 load range B to a 5.70 x 8 load range D on my boat trailer?
Etrailer Expert
Reply from Chris R.

The slightly larger 5.70-8 trailer tire like the Kenda # AM10013 would provide the benefit of a substantially larger weight capacity (1,075 pounds compared to 590 pounds on what you currently have) and would raise the trailer by about an inch. Whether or not this actually benefits you just kind of depends no your specific trailer. If you're pushing the capacity limits of your existing set then getting a larger safety margin is definitely a good idea - it'll allow the tires to run a bit cooler and hopefully last longer because of that. If you feel like you could use just a bit more ground clearance then the larger tire will work well too.

Reply from Steve Q.

@ChrisR Thanks Chris.

Etrailer Expert
Reply from Chris R.

@SteveQ Anytime!

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