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Old 09-15-2016, 08:14 AM   #61
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I have 16's on my fiver. Rated to 110psi for max load. Sailun told me I can run them down to 85psi and they are rated @ 3042lbs capacity at that air pressure.
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Old 09-15-2016, 02:58 PM   #62
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Originally Posted by Fingerlakes View Post
I run them @ 120psi. The dealer told me that would be ok and NEVER run them below 115psi. I plan on bumping them up to 125psi for our trip to Fla. because we'll be "loaded" up for that trip. We are about 15,300 lbs gross normally.
That's what they told me also.
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Old 09-15-2016, 03:58 PM   #63
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Couldn't find a pressure/load chart on Sailun's web site but they would have one if you asked. If you don't need the load capacity of the 125psi you won't be doing your trailer any favors. At full pressure the S637's provide about as much suspension as solid rubber tires would. Even at 100psi my trailer rides a lot rougher on the Sailuns than it did on TowMax's.
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Old 09-15-2016, 04:08 PM   #64
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I emailed back to Sailun for a pressure chart.

Nothing to be gained by running a higher pressure than you need as long as it's within the safe range for the tire. With 7k axles the tire only needs to support 3500lbs, so 3850lbs with a safety margin. Last year I was told by Sailun that the 16" S637 can be run @ 80psi and handle 3042lbs which is under the axle rating but a chart will show how much I need to go up from there.
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Old 09-15-2016, 04:18 PM   #65
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Originally Posted by PlayersZ28 View Post
I emailed back to Sailun for a pressure chart.

Nothing to be gained by running a higher pressure than you need as long as it's within the safe range for the tire. With 7k axles the tire only needs to support 3500lbs, so 3850lbs with a safety margin. Last year I was told by Sailun that the 16" S637 can be run @ 80psi and handle 3042lbs which is under the axle rating but a chart will show how much I need to go up from there.
I just Sailuns on my triple axle Seismic, we gross out @ 20,000#. Had them set at 110 psi as indicated on sidewall. I have 7 K axles, should I go higher PSI?
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Old 09-15-2016, 05:38 PM   #66
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Originally Posted by Navy Chief View Post
Sticker sent to me from dealer showing tire and axel info shows 7000 lb axels, ST23580R16-E tires and 16" rims rated at 80psi.


If I change to the GY or the much better Chinese tires to 85R16-G I think I will have to go to different rims.
Navy Chief according to Tredit, all their 8 lug, 16" wheels EXCEPT TO3's are good for 110psi.

I called them twice and talked to two different guys there.
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Old 09-15-2016, 06:00 PM   #67
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Just heard back from Sailun.

" Steve, thanks for being a Sailun customer. I am glad the tires are working well. I have attached a load / inflation table that shows the LT235/85R16 (page 1, section 2) which actually carries a little less load than your ST tires. It is pretty close so a good reference. You want to use the line marked S for single. Determine your load on the line and then scroll up to the top to determine the required pressure. You can load up to 3750 lbs./tire (actually 4080 for ST) at 110 psi. Based on your description of the tire being stiff, you will likely be able to remove some air. Make sure you check air pressure when the tire is cold.

Hope this helps"


From the chart:
Tire Single (S) PSI 80 85 90 95 100 105 110

LT235/85R16 S 3042(E) 3170 3300 3415 3550 3675 3750(G)


Size (MPH) D/S 90 95 100 105 110 115 120 125

215/17.5 75 S 3695 3860 4020 4180 4340 4495 4650 4806(H)


So for 17.5's on 7k axles you could run them @ 95psi and carry the weight+10%


Last time I scaled my fiver the wheels had 11,620lbs on them with near full waste tanks and empty water as we were leaving a couple of weeks boondocking.
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Old 09-15-2016, 06:04 PM   #68
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Originally Posted by Loboclone View Post
I just Sailuns on my triple axle Seismic, we gross out @ 20,000#. Had them set at 110 psi as indicated on sidewall. I have 7 K axles, should I go higher PSI?
What size tire?
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Old 09-15-2016, 06:38 PM   #69
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Quote:
Originally Posted by jasum View Post
Navy Chief according to Tredit, all their 8 lug, 16" wheels EXCEPT TO3's are good for 110psi.

I called them twice and talked to two different guys there.
Below is the response I received from my Jayco rep after I sent my VIN and they checked the specs of the wheels. Just some info for you.

From: Lueking, Pat
Sent: Friday, August 26, 2016 7:54 AM
To: Gardner, Paul
Cc: Current, Terry
Subject: RE: Tire Question

Paul,
This unit uses tire kit# 0247397 which has the following specs:

Tire: ST235/80R16, load range 'E', tire capacity is 3520 lbs. at 80 psi.
Rim: Aluminum, 16x6 J, 8 lug, rim capacity is 3580 lbs. and 80 psi.
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Old 09-15-2016, 06:48 PM   #70
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Quote:
Originally Posted by PlayersZ28 View Post
Couldn't find a pressure/load chart on Sailun's web site but they would have one if you asked. If you don't need the load capacity of the 125psi you won't be doing your trailer any favors. At full pressure the S637's provide about as much suspension as solid rubber tires would. Even at 100psi my trailer rides a lot rougher on the Sailuns than it did on TowMax's.
I think I would prefer a little rougher trailer ride than constantly worrying about a blow out. I wouldn't think heavy duty / high capacity trailer tires would be designed with a lot of suspension qualities in mind, but that's just me.
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