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GoPackGo's avatar
GoPackGo
Explorer
Jun 12, 2017

Sailun Tires Question

I have a 14k GVWR fifth wheel and put Maxxis M8008 tires on it back in July 2014. Things were fine till yesterday when one of them blew while I was going down the interstate (sounded like a gunshot !). Just some minor damage, which was lucky for me, because I just had disc brakes installed over the winter so I was immediately worried about the hydraulic lines. I really am not sure why it blew. I was running my normal 60 mph and the temp was in the upper 80s. I keep them aired up to 80 psi. Maybe a piece of debris, a nail etc. But maybe it just plain blew. The tire service guy said he sees many that blow on the kitchen slide out side, which did pertain to me (36' Bighorn). He seems to believe that side is always heavier.

I full time so the tires do accumulate mileage - probably 20-30,000 miles now.

I'm looking to (again) replace all four and am seriously considering the Sailun S637T. I have not heard of any Sailun failures but feel free to correct me if I'm wrong.

I just spent some time on their site and I see they have two versions -

1. ST235/85R16 with 4400 pounds capacity. This one is .9 inch taller.

2. ST235/80R16 with 4080 pounds capacity. This would be a same size replacement.

Both are 110 psi tires, 14 ply and take the same size rim. #1 has a little more tread depth. It looks like both are 'L' speed rated (75 mph), which I do not care about, although I do like the increased margin over the speeds I normally run.

So, which would be your the tire of choice, assuming I have the necessary clearance to mount either one ? If I choose #2 (direct replacement) I still have lots of extra capacity, based on a 20 percent pin weight. Theoretically each tire would be carrying 2800 pounds. I guess maybe the better question might be - Is there a reason to go with #1 over #2 if I have the necessary clearance ?

Please - I do not want to go the LT tires route - or start up the debate again. I believe that the stiffer sidewalls of ST tires are what you want under a trailer. And I also want tires that have an adequate load rating (including a generous reserve).

Last -
I have Good Sam as my road side assistance and they did great. The guy on the phone was professional and efficient. Called me back after they located a provider and told me how long it would be (30 minutes) and also sent me a text msg.