Operating Tips

[FOURTEEN]

[ I disagree with that statement. I would venture to say, that about 95 % or all tires are run at the rated pressure.

You are free to disagree, but if you were to venture into owner's manuals, road tests, reviews, and tire spec sheets, you would soon learn that about 95% of new cars, particularly performance cars, run pressures of about 30#IP even though their tires are often rated for a maximum of 44-51#IP!
(The four 235/55HR17 tires on our Azera could carry 6612# at maximum 44#IP! ( Tire Specs for Michelin Energy MXV4 Plus ) That certainly isn't needed for a 3600# car, which is why Hyundai says to use 30#IP!!!!)!!

If a 3600# car needs a tire that could carry a load of 900#, and used a tire that carried 900# at maximum IP, it would be using a very small, very hard tire with a tiny footprint, poor ride and handling, and no reserve load capacity! Even a little 175/70TR13 can carry 1036# at 44#IP, but you don't see any of those roller skates on 'Large' cars!!

If the 235/55HR17 tires on our Azera were inflated to 44#IP, they would ride hard, wear fast, handle poorly, and possibly damage the suspension!

Instead, what is used is a much larger, softer tire at 30#IP with a nice footprint, excellent ride and handling, and plenty of reserve capacity, although that tire may be able to carry a maximum of 1653# at 44#IP!


PS: So, I don't care what the IP are so long as the tires have a proper footprint, provide excellent ride and handling, have the least chance of vehicle or tire damage, and do not exceed the maximum IP! For the PT425, those IP are: 11# Front and 7# Rear!!
.

 

[Marks481]

I always inflate my tires to what it says on the labelplate on the door piller behind the driver's door. I think my Solara says 31# and my Dakota says 32#. The tires on both vehicles say 40-45#. Every car I have ever had has had that label plate there.

Now on the few occasions that I have maxed out (exceeded) GCVWR on my truck, I have inflated the rear tires to the full rated 45# to help support the load.

 

[J_J]

You are free to disagree, but if you were to venture into owner's manuals, road tests, reviews, and tire spec sheets, you would soon learn that about 95% of new cars, particularly performance cars, run pressures of about 30#IP even though their tires are often rated for a maximum of 44-51#IP!
(The four 235/55HR17 tires on our Azera could carry 6612# at maximum 44#IP! ( Tire Specs for Michelin Energy MXV4 Plus ) That certainly isn't needed for a 3600# car, which is why Hyundai says to use 30#IP!!!!)!!

If a 3600# car needs a tire that could carry a load of 900#, and used a tire that carried 900# at maximum IP, it would be using a very small, very hard tire with a tiny footprint, poor ride and handling, and no reserve load capacity! Even a little 175/70TR13 can carry 1036# at 44#IP, but you don't see any of those roller skates on 'Large' cars!!

If the 235/55HR17 tires on our Azera were inflated to 44#IP, they would ride hard, wear fast, handle poorly, and possibly damage the suspension!

Instead, what is used is a much larger, softer tire at 30#IP with a nice footprint, excellent ride and handling, and plenty of reserve capacity, although that tire may be able to carry a maximum of 1653# at 44#IP!


PS: So, I don't care what the IP are so long as the tires have a proper footprint, provide excellent ride and handling, have the least chance of vehicle or tire damage, and do not exceed the maximum IP! For the PT425, those IP are: 11# Front and 7# Rear!!
.

Seems like I agreed with you in an earlier post.


[ Yes. I agree that some vehicles use less air pressure in order to give a stable ride.especially when there is a large offset between the weight distribution on certain vehicles. If tires on these vehicles use max tire pressure, there will be less of a footprint, with the tendency to drift ]

 

[cqaigy2]

When i was a kid and poor, i used to inflate my tires to max pressure thinking it would help with the milage. In the winter id bring the pressure down to help with traction in the snow.

Now i keep the pressure close to what the door panel says, year round.

 

[J_J]

Some tire data from Carlisle. Max load @ 10 mph Turf tire

23 x 10.50 - 12 890 lbs 10 psi 2 ply
23 x 10.50 - 12 1340 lbs 20 psi 4 ply
23 x 10.50 - 12 1760 lbs 32 psi 6 ply

Consider the number of plies when playing around with tire pressure.

 

[catsco]

JJ -

Reading your load ratings from Carlisle reminded me of some info. I wanted to share when I bought new tires for my PT-425.

I wanted to get four-ply rather than the ones that came with it, but called Carlisle and found that they plies they state are RATED, not ACTUAL.

Don't recall if the tire says that or not, but I believe it does (not at the tractor's location right now) say RATED.

No local source, so I bought then on the 'net.

I suppose that's not intended to be less than truthful, but I want ACTUAL plies to keep the sticks and rocks from going through the thinner ones.

Any info. about that from Carlisle? It was about a year ago when I called, and cannot find current contact info.

Regards,
Mark H.

 

[FOURTEEN]

Some tire data from Carlisle. Max load @ 10 mph Turf tire

23 x 10.50 - 12 890 lbs 10 psi 2 ply
23 x 10.50 - 12 1340 lbs 20 psi 4 ply
23 x 10.50 - 12 1760 lbs 32 psi 6 ply

Consider the number of plies when playing around with tire pressure.

The sidewalls on my 4 ply Carlisle LUG tires say: "Inflate To 20 P.S.I Max".

So, if inflated to maximum of 20#, the two front tires on the PT425 could carry 2680#, but, when fully loaded at pucker, they will be carrying 2400# (800+1400+200). Unloaded, about 800#.
(Since it is seldom moving at pucker, I still like 11#F & 7#R!)
.

 

[woodlandfarms]

I have another operating tip. Owning a PT seems to guarantee the dreaded tree / object wrap. Your guys great advice of using the bucket to inch your way away from said object has been a tree saver for me on a number of occassions.