Wheel Pressure Rating

dmnewland · 07-12-2014, 02:46 PM

I have a '08 Fuzion 393 with 16" wheels and would like to upgrade to 235/85 14ply tires but can't find a pressure rating for the wheel. There was a sticker inside one of the wheels that gave a load rating of 3,640lb and the best I can tell the wheels are Phantom 7's. A Google search found one site that had the wheel and said the pressure rating was 110psi but it is the internet. Any one have any idea if these wheels are good for 110psi? Thanks

outwest · 07-12-2014, 05:07 PM

It should be molded into the sidewall of the tire. Sometimes it's really tiny, though, and requires 3x readers to see it

**chuckster57** · 07-12-2014, 05:16 PM

Are you looking for a max air pressure for the wheel (rim) or the tire.

Unless there's something I haven't seen, the rims are weight rated not psi rated.

DanandDonna · 07-12-2014, 06:55 PM

If it is just new tires for your trailer that you are after go the tire makers website and look them up they should supply data you require.

CWtheMan · 07-12-2014, 08:04 PM

Quote:

Originally Posted by dmnewland

I have a '08 Fuzion 393 with 16" wheels and would like to upgrade to 235/85 14ply tires but can't find a pressure rating for the wheel. There was a sticker inside one of the wheels that gave a load rating of 3,640lb and the best I can tell the wheels are Phantom 7's. A Google search found one site that had the wheel and said the pressure rating was 110psi but it is the internet. Any one have any idea if these wheels are good for 110psi? Thanks

Your rim load rating of 3640# corresponds with the load capacity of ST235/85R16E tires rated at 3640# at 80 psi.

Your rims are not suitable for anything above their listed load capacity.

CW

**chuckster57** · 07-12-2014, 08:13 PM

E rating is a 10 ply tire right?
I believe the OP wants to use 14 ply. I am NOT a tire expert, but if I follow his question, his 14 ply tire can be inflated to 110 PSI. And he want to know if his wheels (RIMS) can hold 110 PSI. But maybe I'm reading it wrong.

I agree the limiting factor is the weight rating for the rim, and not the weight rating for the 14 ply tire at 110 PSI.

dmnewland · 07-13-2014, 05:58 AM

Yeah I am wanting to determine the pressure rating of the wheel itself to see if it is rated for more than 80psi. I know it has an 80psi tire on it now but thought there is a chance it could be rated for more.

**chuckster57** · 07-13-2014, 07:06 AM

My brief search shows "phantom 7" wheels may be made by Carlisle. If they are there is a website with contact info.

CWtheMan · 07-13-2014, 01:50 PM

Quote:

Originally Posted by dmnewland

Yeah I am wanting to determine the pressure rating of the wheel itself to see if it is rated for more than 80psi. I know it has an 80psi tire on it now but thought there is a chance it could be rated for more.

Okay, I'll put it another way. The 3640# rating you found on your rim is the highest load capacity any LRE tire currently supports. Load range E tires take 80 psi. If there is not a psi rating on the rim it's manufacturer has not rated it by psi. The current standard uses the rims load capacity only. Any tire with a load capacity of 3640# or less can be used on that rim providing all dimensions are safely satisfied.

There is another 16" LRF tire that will fit that rim but it's load capacity is 3960# at 95 psi, an unsafe fitment. The more common LT235/85R16G tires have less load capacity at 3750# but require 110 psi. They need to be mounted on rims 6 and 1/2" wide.

CW

Got 88 · 07-15-2014, 01:58 PM

Quote:

Originally Posted by CWtheMan

Okay, I'll put it another way. The 3640# rating you found on your rim is the highest load capacity any LRE tire currently supports. Load range E tires take 80 psi. If there is not a psi rating on the rim it's manufacturer has not rated it by psi. The current standard uses the rims load capacity only. Any tire with a load capacity of 3640# or less can be used on that rim providing all dimensions are safely satisfied.

There is another 16" LRF tire that will fit that rim but it's load capacity is 3960# at 95 psi, an unsafe fitment. The more common LT235/85R16G tires have less load capacity at 3750# but require 110 psi. They need to be mounted on rims 6 and 1/2" wide.

CW

I replaced the factory Towmax ST235/80R/16E 3520lbs/80psi on my Raptor with Carlisle ST235/85R/16F 3960lbs/95psi. My wheels are stamped 3750lbs/110psi.

Is this set up okay? I do run the new tires at 95psi, so I'm under the 110psi capacity of the wheel. Also, I didn't need the F rated weight capacity, so I'm well under the 3750lbs capacity of the wheel as well. This is the tire that was available when and where I needed it, so didn't have much choice.

Thoughts? Wanting to make sure it's safe.

gearhead · 07-16-2014, 02:33 AM

Sounds to me like you're good.
Could you post later on your opinion of the Carlisle tires? I have the Towmax and will replace them soon with something.

CWtheMan · 07-16-2014, 07:14 AM

The vehicle manufacturer is the only one that can approve such a fitment. They have the power to do so. Without their approval the fitment is a misapplication.

On another note; Carlisle Tire only recommends full sidewall pressures for all of their ST tires ( that's probably why they don't publish load inflation charts). However, here again, the approval to use lower recommended tire pressures can be approved by the vehicle manufacturer, but, they may have an agreement with Carlisle Tire not to do that.

CW

Jager · 07-16-2014, 09:00 AM

Quote:

Originally Posted by dmnewland

Yeah I am wanting to determine the pressure rating of the wheel itself to see if it is rated for more than 80psi. I know it has an 80psi tire on it now but thought there is a chance it could be rated for more.

I have an 08 Fuzion 302. I had the same question and contacted the wheel manufacture (HiSpec in my case). They explained that the wheel weight rating and max air pressure were molded in the inside of the spokes. I had to pull a wheel to see it but sure enough it was there. There is a thread on here about it complete with photos. BTW > > > although Keystone put BlowMax E rated tires on my wheels . . . the wheels were good for 110psi and G rated loads.

http://www.keystonerv.org/forums/showthread.php?t=17280

dmnewland · 07-19-2014, 05:47 AM

Here is another spin.....If the wheels are only good for 80psi which option would be the best path forward. Buy the 10ply 235/80's and take them to their max pressure rating or buy the 14ply 235/85's and run them under their max pressure rating (95psi max).

fla-gypsy · 07-22-2014, 07:04 PM

My 15" wheels have a weight rating but I have never found a psi rating. I believe it is there somewhere but I keep looking

**chuckster57** · 07-22-2014, 08:45 PM

Can't say I've ever paid enough attention and looked for a psi rating on the rim. I will look in the morning when I get to work, have a fiver up on jack stands for an axle service.

dmnewland · 07-23-2014, 03:21 AM

After pulling the tire off of the wheel I found a sticker with a part number. A google search brought up a Carlisle wheel brouchure from 2007 with the wheel and that part number. According to Calisle the wheel is good for 110psi.

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