Forum Discussion

Cooperchino70's avatar
Aug 17, 2016

Upgraded to sailun s637 Tires, huge difference from towmaxes

I just wanted to post my upgrade experience, I had the OEM towmax tires on my 2012 Avalanche 320rk, they were manufactured in 2011, but had less than 1500 miles on them.

After reading all the stories and seeing all of the pictures of the blowout damage, I didnt want to risk it any more so I made the investment in the Sailun s637.

I had the tire shop unmount one of the towmaxes so I could compare it side by side to the Towmax and there is a huge difference in their physical construction. The sidewalls in the s637 are way stiffer, and there is a big difference in weight Im guessing ~25lbs heavier.

I bought them from http://www.trailertiresandwheels.com/ and I was very pleased with their price and service. I would recommend them to anyone. They were able to fit me in same day and also cut me a deal on a set of 4. Ask for Michael and tell him Colin from Michigan Sent you.

Something I immediately noticed is that the s637 stand up straighter when on the ground, maybe its because of the higher pressure but I can see the sidewalls dont have nearly as much curve in them when rolling down the highway.

Time will tell, but I believe this is going to be a good investment, it sure is nice to have the peace of mind of having a heavy duty tire and not worrying as much about the possibility of blowouts.

Regards,

Colin From Michigan :)


Moderator edit to re-size picture to forum recommended limit of 640px maximum width.

58 Replies

  • laknox wrote:
    If Sailun would only make 15" and 16" tires for those of us running lighter weights...

    Lyle

    They do make 16" diameter size
  • Great choice on the Sailuns, you will not regret it. I have had very good service out of mine so far.
  • If Sailun would only make 15" and 16" tires for those of us running lighter weights...

    Lyle
  • Roger that TX, As my rig is probably ~12000 loaded Its probably ok to back them down a bit. I'll call the US Sailun rep and ask them to be sure.

    Thanks

    Colin
  • If I know what I think I know, but who knows what they don't know, just about all load/pressure charts should be the same. The load for a 235-80-16 LR "E", for example, should be the same whether it is a Goodyear or Sailun. That said, look at a load table for your weights, assuming you know the load on your tires. Then adjust accordingly.
    But be aware that some brands (Carlisle) highly recommend running ST tires at max pressure. However, I have seen a "cut and pasted" email from a Sailun rep that said Sailun is OK running their tires at less than max IF it is within the load range.
    If you are running an un-necessarily high pressure you can shake the trailer a lot and possibly damage the suspension and/or contents. Also the tread footprint may not be maximized. This may be what "Cummins" is getting at.
    We don't need to discuss unsprung weight and added rotational weight, do we? lol
    Be sure your wheels are rated for the pressure you are running.
  • Sailun does not publish a inflation chart that I am aware of, where are you getting your data on that Cummins12V98?
  • Running those tires on that weight of RV at MAX psi is a BAD idea. 85 psi is where I bet you should be using the weight/inflation chart and adding 5 psi.