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Thread: Sailun Tire Update
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07-22-2018, 08:14 AM #151
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Sure looks like (to me) that you have the right tire. I looked at the GD parts site and the stock tire for your Momentum is a Westlake 215/75R-17.5.
This suggests an issue associated with the Momentum, not the tire. Maybe you should get the weight being carried by each tire weighed so you know for certain that's not the issue? Also, check out TucsonJim's thread about alignment.
https://www.mygrandrv.com/fo...ight=alignment
The link (in Jim's thread) to the RV.net post about alignment should be of interest, too.2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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07-22-2018, 08:23 AM #152
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OK thanks. I was confused because originally you stated that it was a load range H tire.
S637 only come in two sizes that are designed for trailer use - I suspect they have stiffer sidewalls. These two sizes are: ST235/80R16* and ST235/85R16* and those tires specify 110 PSI, so you are 15 PSI or 12% too high if you have these tires.
Other sizes of S637 are rated at anywhere from 110 psi to 130 psi max depending on size. If you have an S637 in any other size but the ones stated above, you do not have the correct tires for your rig - you should definitely get rid of those tires
To summarize, you are either running too high of a tire pressure or you have the wrong tires for a trailer. Here's the Sailun data sheet:
I hope this solves your problems.
Safe Travels.
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07-22-2018, 08:27 AM #153
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Saw your post to Howson. You are running 235 75R 17.5 16 ply. See my post above. These are NOT intended for trailer use - suggest you remove them immediately before you have more blowouts. See the * note on the Sailun spec sheet I previously sent you.
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07-22-2018, 08:31 AM #154
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07-22-2018, 08:46 AM #155
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Let me state right up front that you have more mechanical knowledge in your pinky than I have in my entire 6 lb brain. Because I haven't delved into the whole tire issue, this thread is of interest to me so I'm researching as it progresses.
When I look at Sailun's chart, the first two have an asterisk. That means ONLY on trailers. The rest do not have asterisks, so to me that means the rest of the tires listed can be used on vehicles OR trailers.
Let me put it another way: which Sailun tire should he be using if not the 235/75R17.5?
2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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07-22-2018, 08:49 AM #156
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I always thought a commercial tire all position tire referred to truck tires. Hence the commercial label and then the all position usually means it can be used on steer axles or drive axles. I could be wrong and that has happened in the past (once )
ON EDIT: I see Howard beat me to it with a better example also. If you look only the ST in 16" is ST rated. Now I know a lot of trailers are now running LT tires.
I have ST Sailun 16" and thus far very happy with them, of course my trailer is much lighter than Dick's are.Butch
I try to always leave doubt to my ignorance rather than prove it
2020 Imagine XLS 17MKE
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07-22-2018, 08:51 AM #157
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07-22-2018, 09:01 AM #158
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07-22-2018, 09:13 AM #159
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Can't help you on that one - I don't use Goodyears. The basis for my recommendation is the favorable reviews they have gotten on the forums I'm on. I'm sure someone here can share their experience on that.
By the way, I'd pretty much stay away from "China tires" - Sailun is the only good one I've used, seen or heard about.
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07-22-2018, 09:24 AM #160
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In this post the author states he was consistently blowing a specific front tire. https://www.mygrandrv.com/fo...l=1#post176425
I think I've contributed all I can to this thread, so will be monitoring from this point forward. Please update when you find the fix or take action.2017 Ford F-350 DRW 6.7L Platinum
2019 315RLTS (purchased 16 Jul 18 from Campers Inn RV in Byron, GA)
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