Sorry to do this, as I am sure it has been discussed a lot - but my searches came up dry...So there was advice floating around on a past boat forum that properly inflated ST tires were rated for a max speed of 65 mph. For speeds higher, then the official word supposedly was to inflate by 10 lbs higher.I see in an issue of Trailer Life that the same kind of advice was given. For my fifth, I did not see any inflation sticker, so I have always been inflating to the max on the sidewall. But, if I am going to be towing in the 65-70 mph range, should I be going 10 lbs over that? Or is the sidewall pressure the "never exceed" amount?

Advice to drive faster than recommended and using higher pressure than recommended? Doesn't at all sound like good ideas.

I believe Goodyear Marathon said 5# on their web site.

Max tire pressure is for the Load, it has nothing to do with Speed. IMHO

Pony up for LT tires would be my advice if you intend to use the STs beyond their spec. Overfilling is just a bad ideas IMO.Probably not best towing at those speeds especially with a 1/2 ton as your TV.

W5CI wrote:Max tire pressure is for the Load, it has nothing to do with Speed. IMHOWhile the tire pressure is for load, Max Speed rating is not an opinion. It's clearly stamped into the sidewall of ST tires. Blowouts occur because of under inflation and/or heating up the tires because of running them over their speed rating.

Inflating tires 10lbs over? | Good Sam Community

56 Replies

Old-Biscuit
Explorer III
Dec 24, 2015
Here is what Goodyear has to say about it concerning their trailer use only tires.........LINK
Yes they state 10PSI increase to facilitate going above the 65 mph speed rating

Personally.....65 mph is fast enough when towing.

And if one is really concerned about driving faster......buy better quality higher rated tries to begin with
Campfire_Time
Explorer
Dec 24, 2015
W5CI wrote:
Max tire pressure is for the Load, it has nothing to do with Speed. IMHO

While the tire pressure is for load, Max Speed rating is not an opinion. It's clearly stamped into the sidewall of ST tires. Blowouts occur because of under inflation and/or heating up the tires because of running them over their speed rating.
N-Trouble
Explorer
Dec 24, 2015
Pony up for LT tires would be my advice if you intend to use the STs beyond their spec. Overfilling is just a bad ideas IMO.

Probably not best towing at those speeds especially with a 1/2 ton as your TV.
W5CI
Explorer
Dec 24, 2015
Max tire pressure is for the Load, it has nothing to do with Speed. IMHO
Ozlander
Explorer
Dec 24, 2015
I believe Goodyear Marathon said 5# on their web site.
2oldman
Explorer II
Dec 24, 2015
Advice to drive faster than recommended and using higher pressure than recommended? Doesn't at all sound like good ideas.

Forum Discussion

Inflating tires 10lbs over?

56 Replies

About RV Tips & Tricks

Related Content

Tire Load/Inflation Calculation

Tire inflation

Best tire inflator for dually tires

Tire inflation

Tire inflations