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Old 05-18-2021, 09:58 PM   #1
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replacing my 2015 ST 235/75R15 tires . . .

Hello,

We just purchased a used 2016 RPod 179 with the original 2015 (correct) ST235/75R15 C load tires. Having had an older trailer tire blow out on the freeway in the past, I'm going to replace these with high quality new tires. They are not worn, just six years old. Problem, none of the local tire stores, COSTCO, Les Schwab, Wal Mart, Discount tire, carry any in this size. They recommend I buy them on line and they'll install.


So, where do others get their tires? And what do you recommend?
Thanks!
John
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Old 05-18-2021, 10:08 PM   #2
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You can try tirerack.com. Also go to the manufacturer website. You can get Carlisle and Goodyear direct.

There are 100s if not 1000s of posts on this forum with what tire is best. Plus, lots of info about tires and what to do when changing them.
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Old 05-18-2021, 10:22 PM   #3
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Thanks for the info!
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Old 05-18-2021, 10:31 PM   #4
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I would look at changing the tire size to 225/75R15. You'll have a lot more choices.

https://www.costco.com/greenball-tow...100498538.html

Goodyear Endurance is good and popular, available in 225/75R15.

But if you really want to stick with the 235/75R15 mud tires:
https://www.etrailer.com/s.aspx?qry=...nly-pc-15_Inch
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Old 05-18-2021, 10:32 PM   #5
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Quote:
Originally Posted by hobienick View Post
You can try tirerack.com. Also go to the manufacturer website. You can get Carlisle and Goodyear direct.

There are 100s if not 1000s of posts on this forum with what tire is best. Plus, lots of info about tires and what to do when changing them.
Just curious, did you look for 235/75R15?
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Old 05-18-2021, 10:38 PM   #6
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This is the only exact match I can find so far:
https://www.etrailer.com/Trailer-Tir...e/WST54FR.html
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Old 05-19-2021, 09:05 AM   #7
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Those tires have an aggressive tread pattern designed for traction in all weather conditions and off road uses.

Rainier and Westlake are two manufacturers that have them available.

When there is a demand, the off shore trailer tire manufacturers normally take advantage of it, so I expect to see more brands hop on the wagon, so to speak.

Anyone that purchases trailers with that tire size designation needs to know it's quite unique and will be hard to replace with another size designation without options being available from the trailer manufacturer.
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Old 05-19-2021, 12:46 PM   #8
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When you're choosing tires look at the speed rating as well. Some tires from China have a max speed rating of 65 mph. While I seldom tow at that speed, when I do I want a margin of safety. Goodyear Endurance are speed rated at 87 mph, way more than I'll ever need, so that's what I chose.
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Old 05-19-2021, 01:42 PM   #9
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Load Range?

Quote:
Originally Posted by NavyLCDR View Post
I would look at changing the tire size to 225/75R15. You'll have a lot more choices.

https://www.costco.com/greenball-tow...100498538.html

Goodyear Endurance is good and popular, available in 225/75R15.

But if you really want to stick with the 235/75R15 mud tires:
https://www.etrailer.com/s.aspx?qry=...nly-pc-15_Inch
The OP's original tires were Load Range C. I see no problem in going to 225/75R15, especially if they are available at Load Range D. That also provides a more reasonable speed rating (81 mph) than the Load Range C (65 mph).

It's easy to creep above 65 mph on I-95 with the traffic dogging you in every lane.
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Old 05-19-2021, 05:35 PM   #10
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Originally Posted by jatroberg View Post
So, where do others get their tires? And what do you recommend?
Thanks!
John

I just picked up a pair of Carlisle St 225 75 R15 from Amazon. They were delivered 54 hours after ordering them. Went to a local tire shop to have them mounted. They are e-rated tires 2830 lb. Here's a link:

https://www.amazon.com/dp/B01GMTTNU0...p_mob_ap_share.


I hope this helps your situation.
Richard in Milwaukee
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Old 05-19-2021, 05:53 PM   #11
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Quote:
Originally Posted by jatroberg View Post
Hello,

We just purchased a used 2016 RPod 179 with the original 2015 (correct) ST235/75R15 C load tires. Having had an older trailer tire blow out on the freeway in the past, I'm going to replace these with high quality new tires. They are not worn, just six years old. Problem, none of the local tire stores, COSTCO, Les Schwab, Wal Mart, Discount tire, carry any in this size. They recommend I buy them on line and they'll install.


So, where do others get their tires? And what do you recommend?
Thanks!
John
Try These from Goodyear Endurance...MADE IN THE USA......

Tire SizeST225/75R15
Product Code724857519
Speed RatingN
Load Index117
Load RangeE
SidewallBlack
Uniform Tire Quality Grade (UTQG)—
Max Load (lbs)2830
Max Inflation Pressure (PSI)80
Approved Rim Width (in.)6.0-7.0
Measured Rim Width (in.)6.0
Section Width (in.)8.8
Tread Depth (in 32nds)8
Outside Diameter (in.)28.3
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Old 05-19-2021, 10:28 PM   #12
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Originally Posted by ysidive View Post
Try These from Goodyear Endurance...MADE IN THE USA......

Tire SizeST225/75R15
Product Code724857519
Speed RatingN
Load Index117
Load RangeE
SidewallBlack
Uniform Tire Quality Grade (UTQG)—
Max Load (lbs)2830
Max Inflation Pressure (PSI)80
Approved Rim Width (in.)6.0-7.0
Measured Rim Width (in.)6.0
Section Width (in.)8.8
Tread Depth (in 32nds)8
Outside Diameter (in.)28.3
The ST235/75R15 LRD provides 2910# of load capacity at 65 PSI with an 81 MPH speed rating. It is the proper size designation and will not invalidate the trailer's certification label.
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Old 05-19-2021, 10:53 PM   #13
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Originally Posted by Larry-NC View Post
The OP's original tires were Load Range C. I see no problem in going to 225/75R15, especially if they are available at Load Range D. That also provides a more reasonable speed rating (81 mph) than the Load Range C (65 mph).

It's easy to creep above 65 mph on I-95 with the traffic dogging you in every lane.
There is no speed letter for 65 MPH. The only tire I know of that is not in compliance with ST tire speed ratings is Maxxis. They do not provide any form of speed rating on their trailer tire sidewalls which automatically defaults them to 65 MPH.

The ST225/75R15 is a smaller tire than the ST235/75R15 causing the 225 to be a misapplication.
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Old 05-20-2021, 05:45 AM   #14
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Quote:
Originally Posted by Airdale View Post
There is no speed letter for 65 MPH. The only tire I know of that is not in compliance with ST tire speed ratings is Maxxis. They do not provide any form of speed rating on their trailer tire sidewalls which automatically defaults them to 65 MPH.

The ST225/75R15 is a smaller tire than the ST235/75R15 causing the 225 to be a misapplication.
I think that the 225 is so similar that the misapplication would not make a difference. That is probably the smallest item that would be my concern. Overloading the trailer, Exceeding the trucks payload, and or tongue weight etc. would be more of a concern.... Besides that I am not sure if anyone actually makes a 235/75/15. in a ST tire...... I have not been able to find that size in a Special Trailer tire... So if you go to any other 235/75/15 would that also be a misapplication...?
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Old 05-20-2021, 05:55 AM   #15
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Quote:
Originally Posted by ysidive View Post
Besides that I am not sure if anyone actually makes a 235/75/15. in a ST tire...... I have not been able to find that size in a Special Trailer tire...

See post #7 above


https://www.tredittire.com/tire/rainier-st-apex/


https://www.etrailer.com/Trailer-Tir...e/WST54FR.html
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Old 05-20-2021, 06:08 AM   #16
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Unless I was actually going to take this trailer off road on rugged terrain I would opt for the 225 option and go with it.... For typical road travel the 225 ST tire will be more than sufficient.. If Off Roading then I would stay with the 235's that are available.
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Old 05-20-2021, 06:34 AM   #17
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Definitely upgrade to load range D and a high speed rating. I bought my Taskmaster tires from eTrailer, for all 4 of my trailers, and have not had a flat since. To get the higher rating, I had to go to a slightly taller tire. It has not been a problem.
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Old 05-20-2021, 06:45 AM   #18
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Quote:
Originally Posted by Airdale View Post

The ST225/75R15 is a smaller tire than the ST235/75R15 causing the 225 to be a misapplication.
Can you please explain the consequences of this “misapplication”? As an FYI, I wouldn’t consider “It won’t match the sticker” to be a consequence.
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Old 05-20-2021, 07:53 AM   #19
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Originally Posted by NavyLCDR View Post
This is the only exact match I can find so far:
https://www.etrailer.com/Trailer-Tir...e/WST54FR.html

Wow, 285 bucks per tire! Those are my OEM tires on my GeoPro. Couple of years ago, I couldn't find the for sale ANYWHERE, I had started threads back then trying to locate them. I do know they work well for me though, thousands of miles on them.


**btw, these are load D rated to 75 mph.
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Old 05-20-2021, 08:09 AM   #20
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Quote:
Originally Posted by dustman_stx View Post
Can you please explain the consequences of this “misapplication”? As an FYI, I wouldn’t consider “It won’t match the sticker” to be a consequence.
The entire tire industry that fits and installs tires regulated by the Federal Motor Vehicle Safety Standards (FMVSS) and supported by the USTMA standards are expected to abide the following.

Replacement tires should be the same as the OE size
designation, or approved options, as recommended by the
vehicle or tire manufacturer. Never choose a replacement
tire of a smaller size or with less load-carrying capacity than
the OE tire size at the specified vehicle tire placard pressure.

We, as consumers can always inject our own standards. When doing so we must be solely accountable for any safety infractions we violate in doing so.

It is written that vehicle manufacturers have the sole responsibility for the selection of Original Equipment tires that they deem appropriate for each vehicle. They enforce that decision by certification. If they see a need for options they will list such options. They may also allow a list of suitable replacements. But they will not lower their original tire designated size.
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