Replacement Wheel and Tire for Car Hauler with B78-13ST

Question

Question:

I have a Triton A2 Aero Car on a custom built trailer. The trailer is 25+ years old. The tires on it are B78-13ST, were going to haul it from Michigan to Cal. Looking for a set or replacement tire and rims that are Load Range D that will fit onto the trailer. What should I be looking for?

asked by: Jay

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Expert Reply:

The modern equivalent to the B78-13ST is the 175/80-13 like what is on the part # AM31242 that you referenced. You would just need to verify the bolt pattern of your current wheels to know if this would fit. This rim has a 5 on 4-1/2 inch bolt pattern. I attached a help article on determining bolt pattern for you to check out as well.

A better option would be the part # TA43RR though as it has a radial tire which rides and wears better than a bias-ply and it has a speed rating of 81 mph instead of 65.

expert reply by: Jameson C

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Answer 1

I recommend the Tourney Pro Transom Saver #315-FXJ for your 5'x8' plastic boat. The transom saver is definitely recommended with the lightweight plastic boat you have. With this transom saver you can mount it to the trailer by sliding it onto…

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Answer 2

I have a great solution for you. The Taskmaster ST175/80R13 Radial Trailer Tire, part #TTWTRTM1758013C is rated for up to 87 mph as it has an M speed rating. Most trailer tires are only rated for 65 mph so this is a great option for you. Be sure to…

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Answer 3

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…

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Answer 4

The Loadstar 4.80-12 Bias Trailer Tire with 12" Wheel #AM30670 does come with a galvanized wheel that has a silver color to them. The design of the galvanized process gives it a rough texture instead of a smooth texture like you see with…

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Answer 5

The psi of your trailer tires will be listed on the side wall. It will list the max psi which is what you will want to fill them to regardless of how much weight you have. For reference, the 4.80 x 12 tires we carry have a 60 psi max for load range B…

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Answer 6

Really you'd be fine going with either tire but the better of the two are definitely Radials. Radial tires have a longer life than bias tires, usually provide a smoother and quieter ride, provide better fuel economy because they have less rolling…

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Answer 7

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 8

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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