Tires

[SJ-Chris]

Originally Posted by THenne1713

<<Be sure to get the commercial grade "E" rated tires that handle an extra 550 pounds per tire. That is an extra 2100 pounds of capacity on your rear axle at 83 to 90 psi pending the brand of tire.>>
It is rather CONFUSING when talking LT Tires vs Euro Metric Commercial tire. In the (LT225/75R16E) the E is a PLY RATING, (E=10 PLY RATED), even though maybe One steel ply or 7 PLYS, where the (Euro-Metric 225/75R16C, 121/120 Load, 83psi MAX), the "C" is "Commercial", whereas in the old LT Tires, a C1 or C2 (35 or 50 PSA Max), the C1 OR C2 was a 6-PLY RATED.

You don't want a C-load rated tire as those are not for RVs.


Commercial rated tires are NOT the same as C-load rated tires! I understand it can be confusing because Commercial starts with the letter "C", but the "C" in C-load rated tires does not stand for Commercial.


If you are going with Commercial rated tires, you want to see the 121/120 load rating associated with the tire.


Good luck!
Chris

[sgt1577]

Here’s what is going on my camper!!

[fenderworks]

i learned a lot on this one.

[sgt1577]

Twenty minute drive back to my daughters and I can report that so far the tires are excellent! Pretty good ride even at 85 psi!

[THenne1713]

SJ-Chris, I agree, just what I was trying to point out, even if I was not as clear as intended? SGT1577, THANKS for the sidewall PIC, glad to see it has BOTH the (Euro) 121/120 and the "Load Range E" embossed.

[SJ-Chris]

Originally Posted by sgt1577

Here’s what is going on my camper!!

Good choice (121/120 Load Rating).

[Ron Dittmer]

Originally Posted by SJ-Chris

You don't want a C-load rated tire as those are not for RVs.


Commercial rated tires are NOT the same as C-load rated tires! I understand it can be confusing because Commercial starts with the letter "C", but the "C" in C-load rated tires does not stand for Commercial.


If you are going with Commercial rated tires, you want to see the 121/120 load rating associated with the tire.


Good luck!
Chris

Thank you for the correction! What you say is what I meant.

[markone]

Originally Posted by sgt1577

Thanks for the info! I have a ‘17 Fleetwood Jamboree that’s at 32’ long! Probably at the max weight limit when it left the factory! The Michelins that are on it are nowhere close to worn out. I am changing them due to age-I do NOT want to experience a blow out!

We have a 2017 fleetwood jamboree 31U and just had a blowout on a rear factory Michelin tire. It was scary and very inconvenient. Our tire pro suggested we go with Coopers and he has never steered us wrong regardless of vehicle. We just got back from a 1000 mile trip and the Coopers were amazing. Much stiffer sidewall and very comfortable and quiet on the highway. So far we are loving them.

[sibe]

Tires wars.. the debate.....

In all seriousness , good points here... The 225/75/16C tires ARE NORMALLY built on the 120/121 carcass. and that Tire is rated about 550 lbs more load. than a Non C..

Your E450 has a 9600 lb axle.. 4 tires need to carry 2500lbs each ..for argument sake.. the "C" 120/121 tires will do 3000 each all day,

Regular RV 115/116 tires handle 2650-2750 each in rear and are still 10%+ over vehicle requirement..

IMO

Know your vehicles weight and distribution when traveling, A simple stop and get it weighed as you leave your house full loaded..

This information is a key factor..

NEXT is the RV size, length.. , wheel base,,
Most 30 foot or more will have a 190plus wheel base currently.. my older 29.8 foot has a 170ish.. Technically the RV company adds 16-24 inches to the middle of the frame and then up to 36-48 to the rear..
ALL this plays a part on ear Axle loading, a bit different from the original chassis design ...
Loading/leverage and chassis Roll has changed. The tires are the last point of contact and deals with all the stress etc..

SO These longer units will benefit from the C version tire in the REAR positions.
STILL noting your actually weight distribution as RV design (tanks, slides options vary) as even a 24--26 footer may benefit..

THEN lastly PROPERLY inflate those tires.. the 80 or 90 PSI on tire is a max not the pressure you need and that TAG on your door /jamb is a guide based upon what tire was available at the time of manufacturer.. NOT always the tires you are now buying..

For what it is worth.. I have lost 3 rear tires.. and YES I am/was overload on rear axle rating by about 800 lbs, typical in a C if you have a trailer on..especially on the E350 chassis.. Still tire load and pressure I had a 2000 lbs buffer plus..
CAUSES, road trash once.. spare blew 160 miles later since it was BRAND new, kept inside compartment.. BUT 12 years OLD.. DUH...
LASt one that went was new but Stem failed, lost air.. stem was gone,, HENCE use good rated metal stems from now on..

EXpect a tad stiffer rear ride with these 120/121 tires in some cases..