StirCrazy
Kamloops, BC, Canada
Senior Member
Joined: 07/16/2003
View Profile
|
Let me add to this conversation, if your rv had a GVRW for 12400ish lbs and a pin weight of 2500 would you even go to a load range G tire. I decided to kick this down the road for a few years since I have replaced two tires in the last two years (one at the beginning of last season and one last week) and found a third that I suspect had separated so I took the other two in and got them done this morning. so, rolling down the road the weight on the tires should total around 10000 lbs which a good 10 ply is rated for 3500lbs @ 80psi. 70PSI will give me 3000lbs per tire. So as of right now I have 4 new Hercules Power ST2 tires so I am going to run these for the next season or two and decide exactly what I should go with for a tire. is the Sailun overkill? for this weight. I think for 3000lbs per tire from them I would be running at 65PSI
Steve
2014 F350 6.7 Platinum
2016 Cougar 330RBK
1991 Slumberqueen WS100
|
4x4ord
Alberta
Senior Member
Joined: 12/23/2010
View Profile
|
Cummins12V98 wrote:4x4ord wrote:Factory rims …. My trailer came with G rated Michelins.
I’ve considered inflating them to 5psi over the inflation chart recommendation which would put me at about 70 psi, but, because Citation recommends 110 and I don’t really know much about it I figured I’d follow Citation’s recommendation.
Click
You are way overinflated if 70 is the real number.
I was wrong I checked the Sailun tire inflation chart again and according to it my tires should be inflated to 75 psi to carry my 3500 lbs per tire. Adding 5psi like you say would put me at 80 psi. The fact that Citation recommends 110 psi is a little surprising, but I’ve been following their recommendation for years and the tires seem to wear fairly even. I guess if I was going to drop the pressure I’d probably want to get individual tire weights.
2023 F350 SRW Platinum short box 4x4.
B&W Companion
2008 Citation Platinum XL 34.5
|
Lantley
Ellicott City, Maryland
Senior Member
Joined: 08/23/2005
View Profile
 Offline
|
While I agree a tire can be overinflated. I am a proponent of inflating to max. pressure to give you maximum capacity and maxim margin to deal with the impact and effects of pot holes and rough roads.
Sailun's are very tough tires that can take the additional pressure and deliver additional margin and capacity
19'Duramax w/hips,12'Open Range,Titan Disc Brake
BD3,RV safepower,22" Blackstone
Ox Bedsaver,RV760 w/BC20,Glow Steps, Enduraplas25,Pedego
BakFlip,RVLock,5500 Onan LP,Prog.50A surge,Hughes autoformer
Porta Bote 8.0 Nissan,Sailun S637
Correct Trax,Splendide
|
JTrac
Oklahoma
Senior Member
Joined: 10/27/2003
View Profile
Good Sam RV Club Member
|
I've been thinking about changing to a heavier duty tire and I'm considering the Sailun's. My problem is I'm not sure if the wheels on my Pinnacle have the capacity for heavier duty trailer tires. It came with 255/85/r16 Goodyear Endurance. Neither Jayco or Tredit Tire and Wheel, their supplier, could tell me exactly what I have. The wheels are 8 lug and the outside width appears to be about 8 inches. Sailun says their 235/85/r16 S637 needs a rim width of 6.5 inches. Other brands give an acceptable range of rim widths but not Sailun. I would hate to order a set and find they wouldn't work with my wheels. No information is stamped on the outside of the wheels.
JimT
2020 Jayco Pinnacle 32RLTS, 2020 Ford F350, Platinum, 6.7 diesel, 4X4, CCLB, SRW, 12,400 GVWR
|
jaycocamprs
Ringgold Georgia
Senior Member
Joined: 03/28/2004
View Profile
Offline
|
StirCrazy wrote:Let me add to this conversation, if your rv had a GVRW for 12400ish lbs and a pin weight of 2500 would you even go to a load range G tire. I decided to kick this down the road for a few years since I have replaced two tires in the last two years (one at the beginning of last season and one last week) and found a third that I suspect had separated so I took the other two in and got them done this morning. so, rolling down the road the weight on the tires should total around 10000 lbs which a good 10 ply is rated for 3500lbs @ 80psi. 70PSI will give me 3000lbs per tire. So as of right now I have 4 new Hercules Power ST2 tires so I am going to run these for the next season or two and decide exactly what I should go with for a tire. is the Sailun overkill? for this weight. I think for 3000lbs per tire from them I would be running at 65PSI
Steve
I have a GVWR of 14,400 with 6K axels. Loaded is just about your 12,400 with close to 3k on the pin. I'm now on 6 years with the S637s run 90-95 PSI, any more and they don't make contact across the whole tread. I don't need a G rated tire. I would have gotten another set of Bridgestone R250s but Bridgestone changed to the R238, and Michlelin Ribs were way more $$$. Anyway some time this year I'll replace with another set, and I'm running the 235/85/16 tire
2018 Silverado 3500 DRW
2011 Montana Mountaineer 285RLD
|
|
|
Cummins12V98
on the road
Senior Member
Joined: 06/03/2012
View Profile
Offline
|
Proper inflation gives best ride, stopping and tire wear.
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"
"HeavyWeight" B&W RVK3600
2016 MobileSuites 39TKSB3 highly "Elited" In the stable
2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD
|
blofgren
Surrey, B.C.
Senior Member
Joined: 11/26/2005
View Profile
Offline
|
StirCrazy wrote:blofgren wrote:My Sailun S637's are now 8 years old and still look like new. There is some wear on them now, but that is to be expected. I run them between 100-110 psi, but I think they may be a little overinflated. They only lose 4-5 psi over the winter as well. I have not heard of the bead issue you mentioned.
I will not hesitate to put the same ones on again, likely next year, and will likely still fetch a few bucks for these ones on CL or Marketplace.
did you get different rims as well to handle that pressure?
No, my trailer came from the factory with 110 psi rated wheels.
2013 Ram 3500 Megacab DRW Laramie 4x4, 6.7L Cummins, G56, 3.73, Maximum Steel, black lthr, B&W RVK3670 hitch, Retrax, Linex, and a bunch of options incl. cargo camera
2008 Corsair Excella Platinum 34.5 CKTS fifth wheel with winter package & disc brakes
|
blofgren
Surrey, B.C.
Senior Member
Joined: 11/26/2005
View Profile
Offline
|
StirCrazy wrote:Let me add to this conversation, if your rv had a GVRW for 12400ish lbs and a pin weight of 2500 would you even go to a load range G tire. I decided to kick this down the road for a few years since I have replaced two tires in the last two years (one at the beginning of last season and one last week) and found a third that I suspect had separated so I took the other two in and got them done this morning. so, rolling down the road the weight on the tires should total around 10000 lbs which a good 10 ply is rated for 3500lbs @ 80psi. 70PSI will give me 3000lbs per tire. So as of right now I have 4 new Hercules Power ST2 tires so I am going to run these for the next season or two and decide exactly what I should go with for a tire. is the Sailun overkill? for this weight. I think for 3000lbs per tire from them I would be running at 65PSI
Steve
Have you weighed your axles to ensure that they are carrying what you think they are? If so, then the Sailun may be overkill. That said, they are a good heavy duty tire with very heavy sidewalls, and with your stated weights they would last a good, long time.
I certainly wouldn't run them at 65 psi if you decide to go with them, but they would probably be fine at 80 psi. You might find that your tire shop will not mount them on 80 psi wheels, however....
|
CapriRacer
Somewhere in the US
Senior Member
Joined: 01/27/2012
View Profile
Offline
|
JTrac wrote:I've been thinking about changing to a heavier duty tire and I'm considering the Sailun's. My problem is I'm not sure if the wheels on my Pinnacle have the capacity for heavier duty trailer tires. It came with 255/85/r16 Goodyear Endurance. Neither Jayco or Tredit Tire and Wheel, their supplier, could tell me exactly what I have. The wheels are 8 lug and the outside width appears to be about 8 inches. Sailun says their 235/85/r16 S637 needs a rim width of 6.5 inches. Other brands give an acceptable range of rim widths but not Sailun. I would hate to order a set and find they wouldn't work with my wheels. No information is stamped on the outside of the wheels.
Tire engineer here.
Wheels: The best information I have been able to gather is that not only does the government not require a max pressure to be written on wheels, but that wheel manufacturers only consider the max load to be important. I take that to mean that stresses in wheel due to pressure are much smaller than stresses due to the load. As confirmation, I note that when people purpose try to fail a tire by inflating it, the wheel isn't what fails.
Allowable rim width range: It's size dependent, not dependent on the manufacturer (brand). That's because there are tire standardizing organizations and they are the ones who set the range - with the agreement of the tire manufacturers. If you see a spec for one brand, it will be the same if another brand doesn't state otherwise.
********************************************************************
CapriRacer
Visit my web site: www.BarrysTireTech.com
|
JTrac
Oklahoma
Senior Member
Joined: 10/27/2003
View Profile
Good Sam RV Club Member
|
CapriRacer wrote:JTrac wrote:I've been thinking about changing to a heavier duty tire and I'm considering the Sailun's. My problem is I'm not sure if the wheels on my Pinnacle have the capacity for heavier duty trailer tires. It came with 255/85/r16 Goodyear Endurance. Neither Jayco or Tredit Tire and Wheel, their supplier, could tell me exactly what I have. The wheels are 8 lug and the outside width appears to be about 8 inches. Sailun says their 235/85/r16 S637 needs a rim width of 6.5 inches. Other brands give an acceptable range of rim widths but not Sailun. I would hate to order a set and find they wouldn't work with my wheels. No information is stamped on the outside of the wheels.
Tire engineer here.
Wheels: The best information I have been able to gather is that not only does the government not require a max pressure to be written on wheels, but that wheel manufacturers only consider the max load to be important. I take that to mean that stresses in wheel due to pressure are much smaller than stresses due to the load. As confirmation, I note that when people purpose try to fail a tire by inflating it, the wheel isn't what fails.
Allowable rim width range: It's size dependent, not dependent on the manufacturer (brand). That's because there are tire standardizing organizations and they are the ones who set the range - with the agreement of the tire manufacturers. If you see a spec for one brand, it will be the same if another brand doesn't state otherwise.
Thank you. I have a friend who has a couple of tire shops in our town. I'm going to take a wheel to him and he is going to break it down and see exactly what I have. I'm pretty sure I have a 7 inch wide rim rated by the manufacturer for 110 psi and 4400 pound load capacity. This would match the Sailun's and several other tires I'm considering if that is the case. My total weight for the fifth wheel loaded for a month long trip to the Colorado Rockies is 14,700. My hitch weight is 3120 leaving 11,580 on the axles. I know getting the heavier tires would be overkill and I would have to adjust the inflation accordingly but I have always been one to err on the side of safety.
* This post was
edited 06/16/23 06:16am by JTrac *
|
|
|
|
