Tire life?

[Navyvette]

My question is I have S637 tires that are 12/15 dated with lots of tread so what’s the usual life span on these tires?
Also they list 110psi on the sidewall and I’m running 80psi. Should I air them up to max?
In a couple months I’m making the journey from Houston to Orlando and prepping early.

[justme]

Navyvette wrote:
My question is I have S637 tires that are 12/15 dated with lots of tread so what’s the usual life span on these tires?
Also they list 110psi on the sidewall and I’m running 80psi. Should I air them up to max?
In a couple months I’m making the journey from Houston to Orlando and prepping early.

My TPMS system alarms when the pressure in my Sailun's go below 95psi. Also, I would never run them with less than 100 PSI. I have 12450lbs on both axels.

[Me_Again]

Cummins12V98 wrote:
If the chart says 80spi for your actual tire load let er rip! They don't make weight/inflation charts for no reason.

I replaced 80psi "E" tires on my 32.5' Avion with "G" 110psi GY's. I ran those tires for several years at 85psi and had perfect tread wear. If I remember correctly the tires lowest inflation number was 85psi on the chart.

GY recommends when going up in load range to weight the tires and use the chart and add 5psi to the heaviest tire on each axle.

Don't buy the tire needs to be ran at the MAX "BS" because of tire scrub. That is proportional to the load.

Proper inflation will get you a cooler running tire, better stopping, better ride and better tread wear.

Charts are there for a reason, USE THEM !!!

When I ran Michelin XPS Ribs with about 10K on four of them I ran 65(placard inflation) and saw amount of outside edge wear. Increased to 71 and wear was even. Michelin CS also said along with decreased braking that over inflation can lead to impact damage.

All steel ply tires seem to run cooler that poly carcass tires. With RIBs, R250s(29' Cardinal) and S637(39' Bighorn) the trailer tires always ran cooler than the TV tires. Chris

[Me_Again]

donn0128 wrote:
ST tires I would change out at 4-5 years regardless of milage.
LT tires which is my preference I would change out at 7 years regardless of miles.

So the Sailun S637 was a LT tire originally and was re-labeled to ST for import tax reasons. So which category would you put them in? They are also an all steel ply tire.

Chris

[Cummins12V98]

If the chart says 80spi for your actual tire load let er rip! They don't make weight/inflation charts for no reason.

I replaced 80psi "E" tires on my 32.5' Avion with "G" 110psi GY's. I ran those tires for several years at 85psi and had perfect tread wear. If I remember correctly the tires lowest inflation number was 85psi on the chart.

GY recommends when going up in load range to weight the tires and use the chart and add 5psi to the heaviest tire on each axle.

Don't buy the tire needs to be ran at the MAX "BS" because of tire scrub. That is proportional to the load.

Proper inflation will get you a cooler running tire, better stopping, better ride and better tread wear.

Charts are there for a reason, USE THEM !!!

[valhalla360]

If there are no visible signs of wear or damage, don't fix what ain't broke. 3ys isn't excessive by any stretch, so is unlikely to impact resale value.

[Navyvette]

Sounds good I’ll pump them to 95psi and see how things ride. It does a fairly good job of not throwing things around and I’ve packed most of my items in bins already as I’ll be moving out when I get there.

[fj12ryder]

I have 15,000 lbs. on my triple axles, and run the Sailun S637 at around 95 psi. Any more than that translates to a very rough ride in the trailer and things really get thrown around.

I tried running 110 psi at first, but the trailer rode horribly. I've lowered the pressure 5 psi at a time until I've reached the best compromise between carrying capacity and smooth ride. So far so good after 5 years and 20,000+ miles. The tires look great with no excess wear or odd wear patterns.

[Lwiddis]

I vote for a chance complete change at four years. “Tread” isn’t usually an issue on TT tires. Regarding pressure, if you are a tire expert run them at whatever you want but the manufacturer says use the pressure stamped on the tire. Not being an expert I follow manufacturer recommendations but the I was in the Army! lol

See https://www.sailuntire.ca/plt/S637st.html 110 pounds

[Navyvette]

She’s close to 16k loaded and I’m thinking 8k axles. I’ll air them up to 110psi. I feel like coming up on 3 yrs sounds like they are good on age. They look good.
I’ll be selling the coach once I get there and buying a house. Just want to make sire the next owner is set as well. I’m dropping it for a few small repairs before I sell.

[JIMNLIN]

80 psi in a 110 psi rated tire isn't the best idea nor is psi recommendations from a minimum pressure chart the best idea either. Were talking tires on a trailer tech...not tire on a tow vehicle tech.

For 7k-8k axles I would use max sidewall pressures for best long term service.

If you have 5.2k-6k axles then I like what these folks have to say on the subject;

rvsafety.com

Tire Load and Inflation Ratings

Note: Towable – Travel Trailer/ 5th Wheel owners Due to the severe use conditions experienced by tires when axles are very close together – tire industry experts recommend maximum (sidewall) inflation pressure for towable tires unless this causes a sever over-inflation situation (20psi+), often referred to as the ‘basketball effect’. If this is your situation allow a 10 – 15psi safety margin above the minimum required inflation pressure.

[donn0128]

ST tires I would change out at 4-5 years regardless of milage.
LT tires which is my preference I would change out at 7 years regardless of miles.

[enblethen]

The Sailun tires are pretty descent. I would expect 5-7 years.
As for the air pressure, I would weigh the rig. My first thought is you should air them up.