What Does the 5 and the J Indicate on a 15x5J Trailer Wheel and ST205/75D15

Question

Question:

I just bought this trailer and on the sticker for the tire and rim size it is ST205/75D15 FOR THE TIRE THE RIM SIZE IS 15X5J WHAT IS THE 5 J MEAN .I measured the bolt hole and I believe I had 41/2 bolt hole to bolt hole .So can you tell me what tire and rim I need to buy for my spare thanks

asked by: Tim L

0

Expert Reply:

The 5 means that the wheel is 5 inches wide from bead to bead (not overall width). The J indicates the design of the wheel bead seat but it is nothing you need to be concerned with as this is the most common shape for all trailer tires. To measure the bolt pattern accurately I have included a link to an FAQ article that will explain the process.

There is a good chance that you have a 5 on 4-1/2 bolt pattern but you will need to measure to be sure. You will also want to make sure that you match the existing tire construction of the other tires on the trailer; either bias or radial, and you will want to make sure to match the load range on the existing tires.

If you do have a 5 on 4-1/2 bolt pattern and a load range C bias tire, then a match would be # MX94F.

expert reply by: Michael H

0

Frank T.

5/27/2020

My enclosed trailer has a tandem axle and came with st205-75R15 load range C tires. Rims are 15x5J. Is there a problem if I change the tires to a load range D? I just feel more comfortable with a D range because I do a fair amount of traveling.

Reply

Chris R.

5/29/2020

There's no problem at all with this. You can definitely bump up to a Load Range D tire like the Provider # TR20515D to, if nothing else, provide a larger safety margin with regards to capacity for better peace of mind. This particular tire also has a really high max speed rating of 81 mph.

Reply

Ethan K.

1/11/2021

I'm looking to upsize the tires and rims for my trailer. The size of the current tires and rims match the original question. But is there a standard offset with the 15x5J wheels?

Reply

Jon G.

1/14/2021

The industry standard for 15" trailer wheels is zero actually. Sometimes you can find one with an offset but trailer tires perform differently than passenger car tires so the vast majority of trailer wheels will have that zero offset no matter the size. Attached is a link to our selection of 15" wheels for you to check out.

Helpful Links

dept-pg-trailer_tires_and_wheels-sf-wheel_only-pc-15_inch.aspx

Reply

Mike M.

3/18/2024

@JonG I have a question my I closed tandem trailer has 15x5j wheels and 205/75/15”s I was wondering if I can run 225/75/15”s and is so what’s the benefit! I’m asking this as I have a new set already but they are the 225-75-15 ?? Please help me here thanks

Reply

Jon G.

3/18/2024

@MikeM You can definitely replace your 205/75-15 tires with 225/75-15 as they are only about 1/2" larger when it comes to both diameter and width. The only real benefit you might see in this situation is an instead in weight capacity but that all depends on what the load range is for both tire sizes, and it's important to remember that your weight limit won't exceed your least rated component so you may not be able to take advantage of the full weight capabilities of the larger tires.

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See All (5) Replies to Ethan K. ∨

Answer 1

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 2

Yes, for Dexstar wheel 17-384 it is a 5 on 5 bolt pattern. Not very common nowadays but we do have some options. Wheel #AM20428 is a spoke wheel with the 5 on 5 bolt pattern or the mini-mod version is #AM20446DX. We have other 15 inch wheels with the…

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Answer 3

Hello Michael, thanks for reaching out. The Dexstar Steel Spoke Trailer Wheel #DEX54FR actually does not have a specific max PSI rating. It can handle the max PSI of any 15" trailer tire. The max PSI is determined by the tire, and the valve…

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Answer 4

Hey Daniel, I can help point you in the right direction. If I were you I would stick with the radial tires. Bias ply tires use a crisscross pattern for the layers of cord. This make for a more firm sidewall and this is more of an "old…

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Answer 5

From the research that I have done it looks like the specs for each tire is the same. The Kenda Karrier ST225/75R15 #AM10303 is a 10 ply tire with a Load Range of E (2,830 lbs at 80 psi) that can fit 15" x 6", 15" x 6-1/2", and…

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Answer 6

I can see from your image you do have a 205/75R15 tire but I am unable to make out the exact load range for the tire. We have the Karrier ST205/75R15 Radial Trailer Tire in a Load Range C #AM10244(1,820lbs) or Load Range D #AM10245(2,150lbs). Be sure…

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Answer 7

Yes, you can use a ST205/75R15 tire like the Karrier ST205/75R15 Radial Trailer Tire part #AM10244 on a 15" diameter x 6" wide wheel like the Aluminum Sendel Series T02 Machined Trailer Wheel part #AM22653. We also offer this exact same…

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Answer 8

Trailer tires and wheels do not typically come balanced from the factory like what you see with standard passenger vehicle tires. This isn't usually needed for trailer tires and most car shops don't have the needed setup to properly balance…

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Answer 9

Arlin, don't worry - those two wheels are virtually interchangeable. The 15" x 6" like #AM20522 is only ~1/2" wider than the 15" x 5" wheels like #AM20422 that you currently use, so the difference is negligible. If there…

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Answer 10

The 1/2"-20 lug nut that I would recommend is the Kodiak Trailer Wheel Lug Nut #KALN1375S. The reason I recommend this lug nut is because it is a one piece, stainless steel design. So it is going to be the most durable and allow you to use…

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Answer 11

The D in 205/75D15 represents that the tire has a bias ply construction whereas the R in 205/75R15 represents that the tire has a radial ply construction. The difference between a bias and radial ply is in regard to the directions of the cords. In…

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Answer 12

Here are the wheel and tire packages we carry with a 15" x 6" wheel and 5 on 4-1/2" bolt pattern that have the minimum 2,100lb rating you are looking for. Westlake ST235/75R15 Radial Tire w 15" Phoenix Aluminum Wheel #LH52FR…

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What Does the 5 and the J Indicate on a 15x5J Trailer Wheel and ST205/75D15

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