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Old 11-02-2015, 01:47 PM   #1
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Help with tire selection

Looking to get better tires for the RV.. Currently there is Westlake 205/75/14 c rated tires. I wanted to get GY Marathons in the load range D.. I am not over weight but would just rather be safe. This would mean a rim change to 15" which I knew. The catch is the GY only come in 225/75/15. These are 28.3 inches vs 26.1 inches as it is now. I recently read changing tire size (diameter ) is bad for the axels so should I just get the GY in the stock siz3 and settle for c or will I be ok with the larger diameter. I have plenty of clearance above and between tires. Prob 1.5 above and 6" between (swagging it). Thanks.

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Old 11-02-2015, 01:57 PM   #2
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Hankook RA08 or Kumho 857s are the only choice for a true D rated, 8 ply tire.
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Old 11-02-2015, 02:07 PM   #3
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An upgrade to the ST215/75R14C tires would not require new rims and would provide 110# increased load capacity per tire at 50 psi. Their OD is about 1/2" taller than your OE tires.

Look for new tires with a design change providing increased speed ratings.
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Old 11-02-2015, 02:34 PM   #4
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Originally Posted by Airdale View Post
An upgrade to the ST215/75R14C tires would not require new rims and would provide 110# increased load capacity per tire at 50 psi. Their OD is about 1/2" taller than your OE tires.

Look for new tires with a design change providing increased speed ratings.
Hmm ok, thought a c rating would be a c rating. You would be correct. So on a pit stop at the flying j I have 1760 rated tires now so it would be an increase.

Edit: saw the last part about speed rating.. My guess the GY are 65mph rated.

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Old 11-02-2015, 02:37 PM   #5
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Kumho or Hankook 'D' rated carry 2100# each and rated to 99 mph
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Old 11-02-2015, 02:52 PM   #6
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Edit: saw the last part about speed rating.. My guess the GY are 65mph rated.
Yep! I just checked. But, they will have to redesign soon if built over there or be priced right out of the market. New tariffs on imports require speed ratings be shown on all ST tire sidewalls or lose the import tax advantage. Most of them are making small redesign changes to increase speed ratings. The TRA has recommended up to 81 MPH.
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Old 11-02-2015, 03:34 PM   #7
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Yep! I just checked. But, they will have to redesign soon if built over there or be priced right out of the market. New tariffs on imports require speed ratings be shown on all ST tire sidewalls or lose the import tax advantage. Most of them are making small redesign changes to increase speed ratings. The TRA has recommended up to 81 MPH.
What resource/publication are you getting this from? I plan to change out the TT tires next season and it will probably take me that long to digest the information. Timing of purchase might be best tied to the availability of the higher speed rated tires...

Interesting info, this thread has slowed down my impulse to run out and buy the best sale price I see.
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Old 11-02-2015, 05:42 PM   #8
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What resource/publication are you getting this from? I plan to change out the TT tires next season and it will probably take me that long to digest the information. Timing of purchase might be best tied to the availability of the higher speed rated tires...

Interesting info, this thread has slowed down my impulse to run out and buy the best sale price I see.
I agree but am also of the cheap garbage put on these trailers..

So far to and from Florida (still on the road in sc) we have been passed by four trailers going... As typing passed another on the side with a blow out.. As I was saying... Have been passed by three trucks with boat trailers and one 5ver going 75 or so on 95. Shortly after passed them with blow outs on the shoulder... They have us dirty looks when the flew by while we were going 63... Now whose laughing.

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Old 11-02-2015, 06:37 PM   #9
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Doc73.
I have your exact tires. After reading the forums here, I have been a baby with them and followed the advice.
I want to change them, just heard here that a change is coming and want to validate my wait. Hoping Airdale can provide documentation.

Play safe, and I hope your travels are too.
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Old 11-02-2015, 06:49 PM   #10
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Originally Posted by Wobbles View Post
What resource/publication are you getting this from? I plan to change out the TT tires next season and it will probably take me that long to digest the information. Timing of purchase might be best tied to the availability of the higher speed rated tires...

Interesting info, this thread has slowed down my impulse to run out and buy the best sale price I see.
This is not the only reference out there. It's just the first one in my files.

http://www.tirebusiness.com/article/...hina-cv-duties

Before this decision to require speed letters on ST tires the TRA recognized all ST tires to be speed rated at 65 MPH. However there is no speed letter for 65 MPH so the ST tire manufacturers had to redesign in some more heat resistance to get above the 62 MPH rating or be left behind in the wake, so to speak.

The TRA now recommends up to 81MPH for ST tires. But I wouldn't buy any without a speed letter. So you are right to wait.

On edit: Sorry about the ref above. If it's not working for you the same info is in this ref.

http://www.tredittire.com/news/2014/...ernment-tariff
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