Tires

Why not go with S637 235/80/16 G and fageddaboudit?

Sure if you never have a flat it won,the matter. if you want to rotate your tires then maye 5 tires should be in your future. ?

I only bought new tires to put under the toyhauler. I saved one of the old tires for a spare. I hated the thought of spending good money to, hopefully, just sit under the trailer.

My spare is slightly different size. But in 9 years I have never rotated my trailer tires, and my spare has never been on the ground. But it will be fine to get me to a tire shop if I have a flat.

Of note, my tires are not 9 yrs old. They have been replaced. And spare was replaced when I picked up a slightly used, almost same size, tire 3 yrs ago.

I’m not a tire expert but IMHO running a single “80-E” tire with three “85-G” tires, for long term use, would cause a serious alignment issue. The “80” tires are not as tall as the “85” tires and the “E” tire will be softer (and lower) then the “G” tire when loaded. Both of which will cause the axle height of the “80-E” tire to run lower thereby causing the alignment issue. You might get by if you had a pair of “80-E” tires on one axle and a pair of “85-G” tires on the other axle.

To be safe, I recommend you replace all five tires with the same size. However, if you want to keep the “80-E” tire for a spare – remember that the “space saver” spare tire in most cars is smaller than the mounted standard tire and the auto engineers determined that you should be able to get by with it safely for a very short distance in good weather and good driving conditions. But, can you be sure that you will need and use that spare “80-E” tire in good conditions only?

It won't make a noticeable difference if used as a spare to get to the next tire shop.

Bill sailun makes this tire in 235 80 16 I just purchased a set

Thank you for the replies. I realized after posting my question, why not upgrade the spare also. Saving $200 is not a game changer in dollars but having the correct matching tire could be.

I was aware Sailun had a 235/80/16 G tire but could not find it locally. I will have to do more checking. Can those of you who have the 80 series S637 tell me where you found them? My local Big O tire center says they can only get the 85 series tires. Having the 80 series would be nice then I would only need to change 4 tires not 5.

How do you like the Sailun G rated tires and do you run 110 psi or follow an inflation chart similar to Goodyear?

I like my Sailun and inflate them to around 100 psi. I've got about 12,000 lbs. loaded on 3 axles/6 tires.

Personally if I had a good tire to use as a spare, I would. Unless you're going to rotate the tires. I wouldn't buy a new tire to use as a spare unless I had no good tire.

Go to the sailun website contact customer care service tell them where you live they will give you the closest distributor/ wholesale. for the size you need