Modern Tire Size Equivalent for Replacing F78-15ST

Question

Question:

my camper tires have f78 15 St on them I cant find them can I use 215 70 15 tires instead

asked by: Jesusa C

0

Expert Reply:

The Taskmaster ST205/75R15 Radial Trailer Tire # TTWTRTM2057515C would work well for you. It is the same size as your f78-15st and is a radial.

A radial tire flexes more than a bias tire, giving it better ground contact, traction, stability, and tread wear.

A radial tire will normally run cooler than a bias ply tire, especially when the tire is under a load. A tire that runs cooler will last longer.

expert reply by: Jameson C

0

Tyler

3/19/2024

My trailer I just purchased is all steel horse trailer. It's super heavy but also has F78-15st tires on it. It's a dual axle trailer (10 foot long). What do you recommend???

Jameson C.

3/19/2024

@Tyler The Taskmaster # TTWTRTM2057515C I mentioned in the initial answer would work great for you. Do you have any concerns about it though?

Tyler

3/19/2024

@JamesonC yes. Max load is 1800lbs. I'm using a 10 foot horse trailer that is constructed of solid steel. It's a super heavy trailer. I'm not sure tires that are weighted for 1800 lbs (albeit 4 of them) would support a 5000lb trailer with two horses without really stressing the durability of the tires

Jameson C.

3/28/2024

@Tyler So with 4 of those tires you'd have a tire weight capacity of 7,280 lbs. That means you'd have 2,280 lb left over for the weight of your horses or any other tack. So for a higher rated tire in this size you'd want the part # TR20515D which would give you an overall tire weight capacity of 8,600 lb.

Answer 1

The F78/15 stated in modern tire size terms would be a 205/75-15. When you need replacement tires, I'd recommend going with a radial tire because radials do a better job of shedding heat. Excessive heat build-up is the number one cause of…

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Answer 2

The part you are looking for is the Brass Connector for Titan Disc Brake Kit, #T4750300. This is the fitting that threads into the master cylinder that accepts the reverse lockout solenoid on your Titan actuator. I have attached a link to this part…

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Answer 3

Hello Susan, thanks for reaching out. Yes, the Provider ST205/75R15 Radial Trailer Tire – Load Range D #TR20515D is M+S (mud and snow) rated. That marking means the tread design is intended to provide better traction in light snow and slushy…

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Answer 4

Hey Dave, Usually, trailer tires are not balanced with weights like car tires because if the trailer weight changes it can cause the weights to vibrate off. So what trailer tire and wheel manufacturers will do is line up the heavy spot in the wheel…

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Answer 5

Hello Jason, thanks for reaching out. Yes, the Kenda Karrier KR53 ST205/75R15 tire with 15" black aluminum wheel #KE58JV does come balanced from the factory. Trailer tire and wheel assemblies are balanced by matching the tire’s high and low…

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Answer 6

Hi Pete! Good question. Took me a couple minutes, but I did find the difference. The Weigh Safe 180 Hitch #WS94ZR has chrome plated balls and the Weigh Safe 180 Hitch #WS25VR has stainless steel balls. Other than that, they are 100% identical. Same…

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Answer 7

I reached out to Dexter and they no longer make that axle. I can confirm based on the bearing sizes you gave that you have a 3,500 lb capacity. If you determine you just want to replace the hub, I recommend the Trailer Hub and Drum Assembly for…

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Answer 8

Even when stored in the somewhat controlled environment of a garage, tires are still subject to dry rot and flat spotting. Even if the tire tread has plenty of depth left and you can't see any cracking with the naked eye, the generally accepted…

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Answer 9

Hey David! Our strongest ST205/75R15 tire is going to be the Provider item #TR20515D. This a load range D radial tire with a 8 ply rating and a maximum capacity of 2,150 lbs. The load range of a tire indicates its horizontal and sidewall strength. It…

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Answer 10

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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Answer 11

Trailer tires really are only good for around 4-6 years past their manufacture date so you are making the right choice by replacing them now, but the size you mentioned is not a standard trailer tire size, plus it wouldn't fit on your rim as it…

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Answer 12

The H78-15ST tire size is the same as the 225/75-15 tire size like the part #TTWSF22515D that you referenced. I would recommend the radial version of this tire #TTWTRTM2257515D over the one you referenced as it is a bias ply. Radial tires run cooler…

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Modern Tire Size Equivalent for Replacing F78-15ST

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