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Old 04-02-2021, 04:58 PM   #1
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E rated tires more bounce

Found a great deal on some E rated Maxxis tires and had them put on prior to our first trip this year. Older tires were D rated Castle Rocks rated at 65 psi while Maxxis are at 80 psi. Anyone buy up on tires and notice more bounce in the ride? This past trip 2 of my drawers were open (never happened last season) and stuff inside shifted a little compared to my older D rated tires. Kind of wondering if I should have stayed with the D rated ones instead.
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Old 04-02-2021, 05:25 PM   #2
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Found a great deal on some E rated Maxxis tires and had them put on prior to our first trip this year. Older tires were D rated Castle Rocks rated at 65 psi while Maxxis are at 80 psi. Anyone buy up on tires and notice more bounce in the ride? This past trip 2 of my drawers were open (never happened last season) and stuff inside shifted a little compared to my older D rated tires. Kind of wondering if I should have stayed with the D rated ones instead.
There will be a LOT of disagreement, but I believe that if you are running at maximum pressure, you will get a lot of bounce. Unless you are running a lot more weight, you should still run about the same pressure as before. This is Goodyear, but Maxxis would be the same. Don't run max psi unless you are also running max load.
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Old 04-02-2021, 06:36 PM   #3
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E rated tires more bounce

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There will be a LOT of disagreement, but I believe that if you are running at maximum pressure, you will get a lot of bounce. Unless you are running a lot more weight, you should still run about the same pressure as before. This is Goodyear, but Maxxis would be the same. Don't run max psi unless you are also running max load.


Actually I thought about doing this. My weight on the trailer is no where near close to being maxed out. I basically upgraded to the E rated tire to have piece of mind for a stronger sidewall since we are doing a lot of traveling this season. I also do have a TPMS monitor so watching tire temps wouldn’t be a problem to do
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Old 04-02-2021, 06:50 PM   #4
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E rated tires more bounce

I did find this...Click image for larger version

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Are these numbers the weights of PSI per axle? I weighed my trailer before our recent trip and it weighed 5280lbs on both axles.

I am running the 225/75/R15’s
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Old 04-02-2021, 06:58 PM   #5
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Many people will say you must run 80, otherwise you will generate too much heat. The truth is your new tires will perform the same at 65 as your old tires at 65. You should have a good handle of your tire Temps with your old tires, so see for yourself if the new tires at 65 heat up more.
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Old 04-02-2021, 06:59 PM   #6
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Many people will say you must run 80, otherwise you will generate too much heat. The truth is your new tires will perform the same at 65 as your old tires at 65. You should have a good handle of your tire Temps with your old tires, so see for yourself if the new tires at 65 heat up more.


Great point!
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Old 04-02-2021, 07:00 PM   #7
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Per tire.
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Old 04-02-2021, 07:02 PM   #8
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E rated tires more bounce

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Per tire.


If that’s the case it appears according to the Maxxis chart 80 psi is a bit overkill for the total weight of my trailer. Great info from the people on this site. I really appreciate it
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Old 04-02-2021, 07:08 PM   #9
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Is that 5280 both axles combined?
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Old 04-02-2021, 07:09 PM   #10
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The Castle Rock tires seem to 65PSI for D load rating is 2540 lbs. The chart provided shows the E rated tires are the same at 65PSI.

Seems like you'd be safe at the same PSI and not change the carrying capacity of the tires. Obviously look for abnormal wear, etc.
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Old 04-02-2021, 07:17 PM   #11
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Is that 5280 both axles combined?


Yes. Total weight of trailer on both axles
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Old 04-02-2021, 08:10 PM   #12
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Drawers opening

A little off topic.

Our drawers, as I suspect a lot of other peoples', have all come open when in transit if I don't thread a long plastic spoon thru the drawer handles, we also tie the oven closed to the stove, and bunggie the top overhead cabinets to each other, not to mention foam and bungies for the 32" TV.

We've also had to rebuild all the drawer glides with heavier hardware, reinforced the floors for drawers, and reinforced all the attachment points for the drawer slides/glides in the aluminum or wood frames, and all points of contact. Par for the course, I figure.

We run our 15" GY endurance at 80 psi. Gets to 90+ psi on a hot day. Single axle. TMPS. Tires run great, no noticeable bounce, better mpg, and handles way better than the 2 month old factory Westlake China bombs I gave away!
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Old 04-03-2021, 09:41 AM   #13
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Anyone who says you must use max psi of 80 is wrong, and I am right. Seriously, there would be no need for a tire mfgr. to provide a load table if not for different loads. Weigh your trailer and adjust the psi downwards. Do not include tongue weight in your total weight, only what's on the tires.
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Old 04-03-2021, 09:56 AM   #14
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Anyone who says you must use max psi of 80 is wrong, and I am right. Seriously, there would be no need for a tire mfgr. to provide a load table if not for different loads. Weigh your trailer and adjust the psi downwards. Do not include tongue weight in your total weight, only what's on the tires.
You also get the "double whammy" when you go up in Load Range from the original tire.

As load range goes up the tire carcass get's stiffer. Now over inflate it for the load and you might as well go back to the tires of old that were just solid pieces of rubber on the wheel itself.

A pneumatic tire is supposed to flex. It works in conjunction with the springs to absorb road shock.

Read Treybecky's post and you will see what happens sooner or later in RV's when people follow the WRONG advice to inflate to maximum pressure shown on tire. That may well be the proper pressure if using the OE load range tire but when you change, tire pressures should fit the load.

But if you don't mind having to repair drawers, re-hang clothing (as well as the rods in the closet that hold them), and all the other damage caused by road shock, just do as you wish and inflate, inflate, inflate. After all, what do tire companies know.
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Old 04-03-2021, 02:47 PM   #15
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You also get the "double whammy" when you go up in Load Range from the original tire.

As load range goes up the tire carcass get's stiffer. Now over inflate it for the load and you might as well go back to the tires of old that were just solid pieces of rubber on the wheel itself.

A pneumatic tire is supposed to flex. It works in conjunction with the springs to absorb road shock.

Read Treybecky's post and you will see what happens sooner or later in RV's when people follow the WRONG advice to inflate to maximum pressure shown on tire. That may well be the proper pressure if using the OE load range tire but when you change, tire pressures should fit the load.

But if you don't mind having to repair drawers, re-hang clothing (as well as the rods in the closet that hold them), and all the other damage caused by road shock, just do as you wish and inflate, inflate, inflate. After all, what do tire companies know.


That actually makes a lot of sense
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Old 04-04-2021, 01:16 PM   #16
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Can I ask what the deal was on the tires, and do you know if it's still available?
TIA.
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Old 04-04-2021, 03:26 PM   #17
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Can I ask what the deal was on the tires, and do you know if it's still available?
TIA.


I actually lucked out and bought them brand new from a guy who sold his trailer. 300 bucks for 4
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Old 04-04-2021, 03:52 PM   #18
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I actually lucked out and bought them brand new from a guy who sold his trailer. 300 bucks for 4

Ahhh, ok. Thank you.
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Old 04-04-2021, 04:28 PM   #19
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Ahhh, ok. Thank you.


Either way I was going to buy a set of these Maxxis tires. I really like them
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Old 04-04-2021, 06:14 PM   #20
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Our trailer has a sticker on the outside with tire pressure listed. I talked with both dealer and tire place after going with good years. I was told by both to follow the recommendations from the manufacturer just like on a car or truck. Most vehicles have much less air in the tires then what the tire says. I’m told the trailer is rated that way because of engineering in everything from how the tires will wear to the way the trailer will pull behind you. I switched and nothing has changed. The only thing is they do seem to run a bit cooler then the old tires. I will know more after the weather gets a bit warmer and I see how things go.
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