zx12-iowa

I tow an 8k lb boat on stoc tires with no issues. Psi at 40.

uzikaduzi

You're 100% right that the stockers can handle the weight... but going to e rated is not for additional weight capabilities. in fact most stock tires can handle more weight than the truck or axle is rated for. moving to e rated is more about stability. I've towed 8k travel trailers with the stockers and it was acceptable but the stiffer e rated was enough of difference to justify the cost and slightly stiffer ride unloaded IMO

KR_FL72

I'm glad to hear you haven't had any issues pulling with your stock 4 ply's. I haven't had issues the past either, until just recently... and one time is one time too many for me! My F-150 unexpectedly almost rolled over while pulling down the freeway at 70mph due to truck/trailer sway. Very close call! I 'm pretty certain anyone that experienced this would have been cleaning their pants out too & been looking for the cause. Truck also went into several more mild sway scenarios when pulling between 60 and 65 mph. It's evident that some trailers behave differently than others while pulling warranting replacement of P series tires with LT's. This was definitely the cause of my sway issue, and the solution to me pulling safely in the future!


Just my advice to those preparing for the upcoming trailer pulling season. I want others to be aware of the potential safety issue so they too don't unexpectedly encounter the same situation by assuming they're in the clear due to trailer weight being several thousand pounds less than truck ratings.


I know I won't pull with 4 ply's anymore!

Safe travels

KR Kodi

iTrader: (1)

I read your other thread where you said:

HOLY KEERAP!!!!!!! No wonder you had sway!!!

Also, you don't tow with a WDH, so don't have the sway control benefits many of them offer.

Tires will help, but you've got a tongue weight problem!!!

smokeywren

Bad logic. Trailer sway can be caused by lots of factors.

Did your have your weight-distributing hitch with sway control properly set up and adjusted? Was your hitch one of the good ones, such as a Reese Strait-Line dual cam, or Equal-I-Zer, or better yet a ProPride? Did you have the trailer loaded so that tongue weight was 12% to 15% of gross trailer weight, proven by a tongue weight scale for the tongue weight plus a CAT scale for the weight on the trailer axles? Did you have the trailer tires pumped up to the max PSI on the sidewall of the tires? Did you have the tires on the pickup pumped up to at least 40 PSI, or more if required by the load/inflation table for your tires? Was your truck overloaded over the GVWR of the truck?

My F-150 has P-Series tires. I made a 4,200 mile trip and a 3,500 mile travel trailer towing trip last year, with absolutely no sway. I just returned from a 3,500 mile trip towing my 7x14 cargo trailer with absolutely no sway. Those three long trips were all with a Reese Strait-Line dual-cam hitch, properly set up and adjusted for the tongue weight.

Way back when I had a trailer sway episode so I never want it to happen again. But blaming the sway on P-Series tires is not the answer. I now have a ProPride hitch for the TT because the Strait-Line is great but not guaranteed to allow absolutely no sway. When my F-150 was new, I thought about replacing the P-Series tires with LT load range D or E tires. But I had to make that 4,200 mile towing trip before I could find a round tuit. Excellent performance from my P-Series tires on that trip, so I put off spending the money for replacement tires. Now those tires have almost 40,000 miles on them and still have 7/32nds tread left, so I'll wear them out to 3/32nds tread left before replacing them. Then I'll probably replace them with the exact same tire: Michelin LTX A/S P-265/60R18. Those have more weight capacity that a similar LT tire in load range C.