Interesting Delima

[JRTJH]

Originally Posted by workinonit

I called Keystone yesterday. She told me that my unit came with the Oracle or Dexter tires but she couldn't tell exactly which ones. She said it was likely Oracle. But she said they were definitely ST 235/80 R18 G tires. Mine does have the HiSpec tires but in the size and ratings I stated before. I'm going to call this morning and get the managers email and communicate that way so I have a paper trail. I'll give him a chance to get tires so they can replace them next week when I'm up there. I'll let y'all know how it shakes out.

OK Now I'm confused.... Previously you posted that you can not find ST 235/80 R18 G tires and I've never heard of and can not find any 18" ST tires, and in the highlighted red part of your post, you said that Keystone confirmed that the odd size tires on your trailer "definitely came from Keystone" ???? Or did you type the part in red accidentally ??? If so, then what you're saying is that the trailer weight/tire data decal on your trailer was shipped from Keystone with a wrong data plate and the tire size on the decal is not what the trailer was shipped from Keystone as OEM tires ???? If that is what you're saying, then where did Keystone find ST 235/80 R18 G tires ????? AFAIK, they have never been produceed by any brand in that size.....

[NH_Bulldog]

I think he made a typo and wrote 18 instead of 16.

[Peto]

3 year old problem is going to be hard to build much interest in fixing it. I hope I am wrong.

[sourdough]

Originally Posted by Peto

3 year old problem is going to be hard to build much interest in fixing it. I hope I am wrong.

I'm thinking (hoping) it might not be so difficult. If the trailer placard shows the 16 tires, he bought it new and can prove they were the 18" LT tires....the dealership is going to be in a "squirming'' position since that is not allowed.

[rhagfo]

Originally Posted by workinonit

So my Alpine has China bombs and I want to get them replaced soon. Started getting serious about my choice recently and found that Lippert or Keystone or whomever put LT 275/70R18 tires on this camper. So I was simply going to switch to ST in the same size. WRONG. Can't get STs in 18" or get close to that size. In order to go to STs I have to go 16". I can get within an inch of the height by going ST 235/85R16 and I can get them in a 16 ply or 14 ply. Now I have to have new rims. I know I've seen tire/rim combos but those are typically in 10 ply max. I'm throwing this out there because I feel like I'm on an island making this decision and would really like to have some input from some of you. The LT tires I have have a 125/122S rating. Best I can tell that's around 3638 pounds at 112 mph. I didn't look up the 122 rating. What I'm seeing is that these tires shouldn't be on this unit at all.

Originally Posted by ChuckS

Original wheel would have been a 16 inch rated at 110 psi cold (3750 load rating) ,, tires on every 2022 Alpine made were Oracle Hispec ST 235/80x16 14 ply G rated

The Hispec tires were junk and there have been dozens of posts with pics of the damage incurred

Most Alpine owners .. including myself switched to ST235/85x16 H rated 14 ply tires .
Note.. older Alpines like mine came with E rated trailer king tires.l dumped those a week after buying and upsized to current size as listed above.

I’ve been running that size tire for 11 years .. ram first set for 7 years and on second set now

Well maybe the previous owner chose to go with a higher quality LT tire over a lesser quality ST tire with a very similar weight rating and much higher speed rating.

Wheel only rated at 3,750# the LT tire rated at 3,638#, so;
LT 3,638# x 4 = 14,552# on a 5th wheel GVWR of 15,000#
16" wheel rating 3,750# x 4 = 15,000#

So the LT tires are short of the 5th wheel GVWR of 15,000 by 448#, considering that at minimum a 5th wheel carries 20% of weight on pin, or 3,000# then the axles are only carrying 12,000# on tires rated for 14,552# and meet much more stringent construction and quality standards, I personally would stick with the 18" tires.