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Old 11-21-2014, 10:31 PM   #1
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F150 EB Towing with P rated 275/55 20s

I just traded my '03 Dmax for a 2012 F150 EB Platinum SCREW 5.5 with the stock 20" rims and 275/55 tires (Pirelli Scorpions). I'm just curious how folks are making out with the stock P rated tires. I know the tires are rated for the stated capacity of the truck, thats not the issue, I'm curious how you make out with the tires in the real world. With the winter they are predicting around here, it will likely be several months before I really get a chance to try it out myself, other than perhaps a "test" run after I set up the Equalizer hitch.

Next question and this might be better posted on the F150 forums but I'll give it a shot. Has anyone switched out for an LT tire? I see that Michelin, BF Goodrich and Goodyear all make an LT in the 285/55 20 size. From just nosing around a bit, it appears that tire would fit on the stock rims without problems. Anyone got any real world experience with the swap. I would think the LT's would be more stable, but perhaps the Ps aren't too bad either. As you can see in my signature, I tow a 28' Safari.

BTW, so far I really like the F150. It's got all the bells and whistles and seems to be quite comfortable so far (a longer trip than an hour will tell more). The seats in the Chevy where horrible as far as I was concerned. As much as I liked the Dmax the F150 is way more fun to drive on a day to day basis. It's much quieter and in comparison it handles like a sports car (which of course it isn't and shouldn't be driven as if it is).

I had the Michelin LTX's on my 2500 Silverado Dmax and they worked out very well. That said, I might be tempted to try the Goodyear Wrangler AT Adventure with Kevlar after reading the ratings on the Tire Rack site. Although being able to buy the Michelins at Costco (if they carry the size) is a plus for me (Costco only carries Michelins and Bridgestones).

Oh yeah, I do miss the sound and even the smell of the diesel at times LOL. Looking at the engine specs, the EB gives you the higher HP for "fun"/Acceleration with a decent torque level for pulling. For the F150: 365hp and 420 torque at a somewhat diesel like RPM of 2,500. For the Dmax: 235hp and 500 ft lbs of torque at 1,600. Of course the newer ones are a different story with around 700 ft/lbs of torque. But then I'm not pulling a triple axle 5er. Oh well, there I go off topic again. Back to the 20" stock wheel tire combos please......
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Old 11-21-2014, 10:55 PM   #2
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We have towed with the original P-rated 275/55 tires on our 2012 Ram 1500 coast to coast twice without problems, now on our third trip. Handle well, don't overheat, very stable with ProPride hitch, not so stable with Equal-I-Zer hitch.
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Old 11-22-2014, 05:39 AM   #3
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I like to use Tire Rack where the reviews are from those with at least 20k miles of use.

And keep tread width identical (very very close) to rim width.

I buy from Discount Tire as they will come close to TR prices and have large national coverage. I would not buy a tire from a box retailer unless tire was absolutely identical.


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Old 11-22-2014, 06:11 AM   #4
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I have a 2010 F-150 with the 20" wheels. My truck came with Pirelli Scorpions originally. I burned the edges of the first set within 20,000 miles tried a second set that had other issues before switching to Michelin LTX M/S2's . My first set of Michelins still had 40% of its tread at 60,000 miles when I swapped them out for a new set. Quiet, no vibrations, good in rain, good in snow, what else can a person ask for?
I should mention that I do my own tire work as I own a repair shop. I always replace my own tires when they get to the 30% to 50% wear point as I believe that the best of the tire is used up by that point.
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Old 11-22-2014, 06:29 AM   #5
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Quote:
Originally Posted by Soyboy View Post

Next question and this might be better posted on the F150 forums but I'll give it a shot. Has anyone switched out for an LT tire? I see that Michelin, BF Goodrich and Goodyear all make an LT in the 285/55 20 size. From just nosing around a bit, it appears that tire would fit on the stock rims without problems. Anyone got any real world experience with the swap. I would think the LT's would be more stable, but perhaps the Ps aren't too bad either. .
I am not familiar with P load range - the Pirellis in the size seem to be SL load range at 2400 lbs - roughly a D or XL.

In my experience, switching to the 285/55, which is an E rated tire, will be a big improvement. When we first got our Airstream, one of the first things I did was switch to larger E rated tries on the 1/2 ton. The stability was greatly improved. "Less squishy" tracking, stopping and turning is how I would describe it.

However I do not think it is so much of an improvement that I would switch out brand new tires to the tune of $1000+. Personally, I would wear out the stock tires first, then switch.
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Old 11-22-2014, 08:40 AM   #6
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Good input.

Slow, from what I have seen, the tires are identical at Costco. They always seem to do a great job and when they do their free rotations they rebalance the tires too. I don't know if a place like Sears or Walmart trains their employees as well etc. so I understand what you are saying about most big box stores. The other nice thing is the guys at Costco only do tires. You are right about TR and DT. I have bought many tires from them over the years. I have been mail ordering tires for about 40 years. Used to get my Armstrong Tru Tracs from Dick Cepek LOL. I am starting to find that local tire retIlers and even car dealers are either close or even matching mail order prices. Plus I'm not beyond paying a few bucks more for local service on a number of occasions.

DKottum I guess time will tell how the Equalizer works with my set up. I will need to really take some time and dial it in, as I think the setup will be even more critical on this lighter vehicle.

Wayward, yes I had checked the other day, the Scorpions are rated at over 2400 lbs. I can't remember the exact amount. I think you are right about trying them out. The early season trips we take are usually only a couple of hours each way. Plus I'll give it a test run whenever I get out there and can spend some time setting the hitch up.

Bruce I am a big fan of the LTXs. I ran them on the Dmax and they got me through everything, and we have been having some very nasty winters in recent years. They were also good in the rain. I have been tempted by the Wranglers as they have great ratings on the Tire Rack and I have never gone wrong going the the top rated tire. It seems like folks are a bit happier with them in the snow eye. Over the LTXs. The flip side, I have a few doubts about the quality of GYs vs Michelin. I could start an ST thread if I'm not careful LOL.
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Old 11-22-2014, 05:15 PM   #7
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We've got a very similar size and I've been thinking of going to a 275/65/20 on my Ram, it's about .50 of an inch taller than my 275/60/20 and there are a few E rated tires in that size, Michelin being one of them.

Our P tires have been "ok" but not amazing. I've very much on the fence.

Quote:
Originally Posted by dkottum View Post
We have towed with the original P-rated 275/55 tires on our 2012 Ram 1500 coast to coast twice without problems, now on our third trip. Handle well, don't overheat, very stable with ProPride hitch, not so stable with Equal-I-Zer hitch.
Did you switch from those Goodyear Wrangle SR-T's to another brand by chance?

When we bought our truck, they had just installed brand new ones that day. I am not a fan. And while I've considered upsizing the tire to accommodate E rated tires, Switz has me thinking I might just get Michelins and call it a day.
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Old 11-22-2014, 05:23 PM   #8
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My truck came with the 20" Pirelli Scorps and I drove them for 42K miles with no problems, 75% of that towing. Inflate to 42-45 lbs. I replaced with a Nitto terra grappler XL tire with a E rating. Good all around for highway towing, snow and off road.
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Old 11-22-2014, 06:04 PM   #9
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We towed about 2,500 miles with a 2011 F150 Platinum EB and the stock Pirelli tire. They did just fine, but I felt there was a bit of softness/squishiness with those. I ended up swapping out the Pirelli tire for a set of 285/55 20 Cooper's (Discoverer AT/2) and am very happy with the change.

In fact, we're trading out our 2011 F150 for a 2014 (same F150 and trim) next week and will transfer the tires over to the new truck.

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Old 11-22-2014, 08:18 PM   #10
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Quote:
Originally Posted by BoldAdventure View Post
We've got a very similar size and I've been thinking of going to a 275/65/20 on my Ram, it's about .50 of an inch taller than my 275/60/20 and there are a few E rated tires in that size, Michelin being one of them.

Our P tires have been "ok" but not amazing. I've very much on the fence.



Did you switch from those Goodyear Wrangle SR-T's to another brand by chance?

When we bought our truck, they had just installed brand new ones that day. I am not a fan. And while I've considered upsizing the tire to accommodate E rated tires, Switz has me thinking I might just get Michelins and call it a day.
Hi Bold, still the original Goodyears at 34,000 miles and quite a bit of tread wear left, lots of towing miles.

I would reconsider going to a larger diameter tire as this will effectively lower your engine rpm and reduce power at any given truck speed, not good for towing a 25' Airstream with this truck. That is assuming you have 3.55 rear axle as we do, I don't know how a different axle ratio would work out.
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Old 11-22-2014, 09:14 PM   #11
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I know mine has the 3.73 Elec Locker so .50 likely won't do much if I did size up one notch.

BTW, I guess you guys that have sized up to the 285 didn't have any fit issues. I think I've read where the 305s can start to rub the control arm on tight turns.
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Old 11-22-2014, 09:19 PM   #12
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I wonder how much difference there is between an XL and an LT?
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Old 11-22-2014, 09:38 PM   #13
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Hi Bold, still the original Goodyears at 34,000 miles and quite a bit of tread wear left, lots of towing miles.

I would reconsider going to a larger diameter tire as this will effectively lower your engine rpm and reduce power at any given truck speed, not good for towing a 25' Airstream with this truck. That is assuming you have 3.55 rear axle as we do, I don't know how a different axle ratio would work out.
Impressive. I might just run these out and focus on the rest of my Airstream mods and worry about tires when I need knew ones.

The math works out like so:

We have the 3.92's.

BFGoodwrench offers a tire that is E rated in our OE size now, but it's an A/T so... bummer.

Thanks for the input.
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Old 11-23-2014, 01:32 AM   #14
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I know mine has the 3.73 Elec Locker so .50 likely won't do much if I did size up one notch.
I just upgraded our oem F250 tires to larger Firestone Destination AT's. That went from the OEM diameter of 31.4" to to a 32.8". It has 3.73 gears and there is no noticeable difference in towing. The new tire diameter is entered into the power train computer so, with a six speed tranny, the software keeps the torque curve in the right place with the new tires.

These tires also took the OEM section width from 10.1 to 11.5". As this width clearance varies much by model, truck forums are a better place for recommendations on how wide to go. But for actual tire width, look up the section width, instead of using the metric size designation.
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