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Old 06-16-2014, 03:54 PM   #1
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X17Z Tires?

Hello:

We have a 2012 X17Z with a large trip coming up. So I looked at the tires to check them out. The ID tag on the unit says they should be ST205/75-14 with a load capacity of 1760#

Our unit has ST185/80-13 tires with a load capacity of 1347# Our dry weight alone is 3055#. So the 13s have to go. Our dealer is checking with Jayco to see what up.

What do your X17s have on them?

Thanks for the time,

Greg
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Old 06-16-2014, 04:41 PM   #2
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I'm surprised the load tag shows 14s as stock. The ST185/80-13 are standard stock tires on all the Jayfeather UltraLites. My X20E has them as did our old Kiwi 17a. Keep in mind too that the tongue weight is not calculated in the tire/axle load, although I would think the tire rating would add up to just over 3000#.
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Old 06-16-2014, 09:28 PM   #3
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I knew about the tw subtraction but was still surprised that the loading was so low on the tire. I also figured it would be 1500ish per tire not 1350ish.

Dealer also said that 14s seemed big. He has a bunch of X17s on the lot and was going to look at them and see what he could find.

Either way, from what I can find, a 13 load range C is 1350# How can they put them on a single axle 3000# trailer?

Thanks for the reply.

Greg
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Old 06-17-2014, 07:44 AM   #4
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I'll have to look at mine when I get a chance. I never really checked them.
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Old 06-17-2014, 07:57 AM   #5
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Maybe they should be load range D tires. 13" Ds are right at 1725# however, 13" load range D aren't that common are they? That is also a nice safety factor load wise.

Thanks,

Greg
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Old 06-17-2014, 08:15 AM   #6
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Trouble is, even if you put a higher load range tire on, the axles are the weak point. The axle capacity will add up with the tongue capacity to exactly the GVWR.
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Old 06-17-2014, 11:50 AM   #7
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Yes, we will not exceed the GVWR.

I just heard back from the dealer. The stock size is 185/80-13 but they are Goodyear radials with 1660# rating in load range C. So, the previous owner changed tires on a 1 1/2 -2 year old unit?

So I will look at Goodyear, Carlisle, Maxxis. Should I just go with the 14" set-up and gain some ground clearance or just leave it?

Thanks,

Greg
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Old 06-17-2014, 01:38 PM   #8
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Quote:
Originally Posted by greobr33 View Post
Yes, we will not exceed the GVWR.

I just heard back from the dealer. The stock size is 185/80-13 but they are Goodyear radials with 1660# rating in load range C. So, the previous owner changed tires on a 1 1/2 -2 year old unit?

So I will look at Goodyear, Carlisle, Maxxis. Should I just go with the 14" set-up and gain some ground clearance or just leave it?

Thanks,

Greg
Wow! That's not cool. It came with TowMax tires. Some people change them because of concerns about blowouts (they are Chinese made). But he didn't do himself or his family any favors by buying undersized tires!

Me personally, I would just stick with the 13". Some people go to 14 for the extra clearance like you're thinking, but its personal preference. I've yet to have any issues with either hybrid I've owned, both with 13" tires.
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Old 06-18-2014, 09:23 AM   #9
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Just bought our 3rd set of ST185/80D 13/8 STC HI-RUN.
MAX LOAD 1710 LBS AT 65 PSI

They have worked well for us.
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Old 06-20-2014, 08:02 AM   #10
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I replaced the D rated 13" tires on my 165 a few yrs ago and have no issues. I looked into 14" replacements but unless I wanted to put on small lift the tires would get pretty close to the wheel well in a suspension cycle so I stayed at the stock size.
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