Originally Posted by Larry Mac
What are the towmax tires people speak of?
Original equipment tires that come on Jayco's from the factory. Prone to blowout and separation. Says "TowMax" on the sidewall.
Sent from my iPhone using Tapatalk
Originally Posted by TexasRT
I personally went with the 17.5" setup over the 16" for the additional load capacity of the tires and wheels and the H rating was a plus also. The way I figure it, I'm increasing my total load capacity at the tires by about 5000# over what I had. It may be overkill but I would rather have way to much than the bare minimum (IE factory). I guess everyone has their personal preferences.
The 17.5's give you more load capacity and if you need new wheels anyway then if you want to spend more buy the 17.5's. I considered it myself but put 16's on the stock wheels.
Originally Posted by JetTech
So I feel like I'm missing something in the conversation here:
For everybody that traded out their wheels from 16's to 17.5's, was that because the 637's aren't made in a 16? If so, why not go with the 637T's showing on Sailun's site? Sailun Commercial Truck Tires: S637T HD ST Trailer
Yes, the load is higher than what you may need, but not by that much, and they advertise them as a 5th wheel tire. I guess the argument only stands if the factory wheels are able to take 110 psi. I'll have to crawl under mine and see what it's stamped for!
Just trying to make sense of it, as after reading some of the posts, I'm scared to continue running my factory tires on my 377RLBH! She's heavy for sure...
Sailun S637's come in a 16". I have 235/85-16's on my fiver since last fall. They are a bit taller than the stock tires but if you have enough distance between the tires you can use them.
The trailers come with 7k axles. If the tires are evenly loaded (probably not, would need to scale each wheel) then they are carrying 3500lbs each for a maximum.
Last winter I scaled my setup and had:
Truck - 5080lb front, 7640lb rear
Airing tires up to carry 4800lbs/tire doesn't gain you any carrying capacity. As long as they are inflated within the safe range specified by the manufacturer it gains you no safety either. I know that with the Sailun's on vs the TowMax's things in my trailer take a lot more beating as more road bumps are transferred into the trailer.
My truck tires are max 80psi but I don't run them that high as I like some comfort. I run 65 all round unless I'm towing then I run 70 in the back.
In the end, you choose how you want to run tires depending on your comfort level.
Also, Sailun/GY614 will put a lot more deflection load on the suspension when turning tight. I cringe when backing my trailer in beside the house as the suspension gets all distorted