16' Caravel Tire Pressure

[Mighty Mite]

Just checked the Goodyear web site for this info in regards to our ST225/75R15 Endurance tires.
Info below is for two tires and allowable weight at certain psi. As a bench mark, our max GVW is 4,300 lbs.

50 psi: 4,300 lbs
55 psi: 4,540 lbs
60 psi: 4,760 lbs
65 psi: 5,080 lbs
70 psi: 5,240 lbs
75 psi: 5,440 lbs
80 psi: 5,660 lbs (MAX PSI for these tires)

At all PSI, max speed is 87 MPH.

Question: What psi are you running your 16' Caravel tires at? Note: 22' Caravel max GVW is 5,000 lbs and uses the same tire size.

Bob

[CapriRacer]

Does your trailer have a vehicle tire placard located low on the driver's side front? What does it say for tire size and inflation pressure?

What year is your trailer?

[Mighty Mite]

Picking up 2021 16' Caravel on Monday Dec 7th. Will check tire placard at that time.


This is more of a practical question of "why" have the tires inflated to 80 PSI when a lower PSI would still give a large carrying capacity compared to our max 4,300 lbs.


Another way to look at it. The 22' Caravel has a GVW of 5000 lbs and we have a GVW weight of 4,300 lbs. "Why" do we both need to be a 80 PSI?


Bob

[Bill M.]

My opinion is that you could run those tires on that trailer at any pressure between 50 psi and 80 psi and the tires will be just fine. The trailer not so much so. I would opt for 55 psi as a start and see how it does. There is no "inter ply shear" for 2 axles so no need for the high pressure to guard against that. A tight turn backing will not pop the tire off the rim. I age my tires out after 4 years. I see no wear during that time. I run PXL tires at 50 psi on my dual axle 25' and they ride and work just fine.

[Wazbro]

My opinion is that knowing that chart is the minimum pressures for those weights and sometimes tires lose pressure I would prefer a 20% safety margin, so by that chart I would go with 60-65 psi for your trailer. Also some trailers aren't balanced well side-to-side so they need that safety margin to keep one side from being overloaded and then they might have more storage space on the heavy side so if your not careful it gets even worse.

[LDDuffy]

Just installed 215/75R14 Endurances on my 16’ Sport. Says on tire “for max load inflate to 65 PSI.” The very good tire shop I use said to run these at 65 PSI at all times.

[guskmg]

You want to run as much air pressure as you need to support the heaviest side. The only way to determine that is to weigh the single axle tires separately then you can check your chart. For the recommended psi, divide the chart 2 tire max weight by two. On two or three axle trailers it is just safer to use the max side wall placard psi. You could weigh them separately with individual scales. Some other brand clubs have some one at their rallies with those scales for member use. I'm not sure about WBACI.
guskmg

[Greenjeans]

I started out running 60psi in my ST225/75R15 Endurance tires. Using the chart and then the 20% rule. Over time I’ve gradually increased my tire pressure and now I’m running at just below 75psi. I’ve noticed no difference in how things ride in the trailer. Very little movement, no popped rivets. Maybe the shocks are the difference, possibly the tires, I don’t know? This is just anecdotal, but I also feel that when it windy the trailer is more stable going from 60 to 75psi, it has a taller profile and is wider than my last trailer.

My prior trailer, a Casita was also riveted, had a dexter axle, but no shocks, Carlisle tires, I reduced the PSI to cushion the ride. Running close to manufactures recommendations cushions were everywhere, things riding on the bed were on the floor, things on the floor traveled from place to place, rivets popped. Very ruff on the trailer.

My 16ft Caravel trailer tag says 80PSI. Just haven’t had any issues with this trailer & tire PSI. That being said I would not have a problem with running lower PSI if I felt it was hurting the trailer. Did it for 10 years on my last trailer and unlike Goodyear, Carlisle did not offer a chart for trailer weights & adjusting PSI.