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01-26-2015, 10:20 PM
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#1
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Rivet Master
2005 25' Safari
Salem
, Oregon
Join Date: Mar 2006
Posts: 8,367
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New tires for 2015?
Hi, today I went to my local Ford dealer. The same one where I bought my 2014 F-150. I wanted an up close look at the new 2015 Aluminum F-150. At first, I couldn't find one, but I found one, only one hidden in their back lot. Must be already sold. Driving by the dealer, but un-able to stop, I have seen some 2015 F-150's out front, but they must be selling well because those are all gone. Anyway, I was looking at this truck, all of it, and noticed something strange about the tires on it. These tires show the size, but they don't say "P" or "LT" on them. So what are they? Did they decide to not mark tires on pick-ups as "P" passenger type tires?
__________________
Bob 2005 Safari 25-B
"Le Petit Chateau Argent" Small Silver Castle
2000 Navigator / 2014 F-150 Eco-Boost / Equal-i-zer / P-3
YAMAHA 2400 / AIR #12144
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01-26-2015, 10:26 PM
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#2
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1987 Avion 34W owner
Vintage Kin Owner
Good Ol'
, USA
Join Date: Mar 2014
Posts: 2,090
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M+S tires: M+S, or M&S: Mud and Snow; A tire that meets the Rubber Manufacturers Association (RMA) and Rubber Association of Canada (RAC) all-season tire definition. [17] These are winter tires, with self-cleaning tread and average traction in muddy or very snowy conditions, and for low temperatures. Spike tires have an additional letter, "E" (M+SE).
Just another classification of tires.
__________________
I this great country!!!!
1987 Avion 34W
1995 Ford F250 7.3L PowerStroke
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01-27-2015, 02:22 AM
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#3
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Rivet Master
2005 19' Safari
GLENDALE
, AZ
Join Date: Aug 2004
Posts: 2,453
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ROBERTSUNRUS, these appear to be the tires in your photo:
http://www.tirerack.com/tires/tires....omCompare1=yes
While the "SL" indicates that this is a "standard load" passenger car tire, the 51 psi max pressure is higher than usual. However, the maximum load rating of 2,679 pounds certainly seems adequate for a pickup.
Partial description extracted from TireRack.com:
"The Wrangler Fortitude HT is Goodyear’s premium Highway All-Season tire developed for pickup truck, crossover and sport utility vehicle drivers with long to-do and want-to-do lists. Already earning on-road fitments as Original Equipment on popular 2015 model-year light trucks, Wrangler Fortitude HT tires are designed to blend ride comfort and long wear with all-season traction in dry, wet and wintry driving conditions, even in light snow.
"Wrangler Fortitude HT tires feature Goodyear’s innovative lower rolling resistance tread compound to enhance vehicle fuel efficiency."
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01-27-2015, 04:54 AM
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#4
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 19,977
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OMG.....GYM's for TV's.
Unlace 'em and replace 'em.
Bob
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01-27-2015, 07:20 AM
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#5
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Always learning
1972 29' Ambassador
1962 19' Globetrotter
1951 21' Flying Cloud
Central
, Texas
Join Date: Oct 2010
Posts: 2,881
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__________________
Lance
Work is never done, so take time to play!
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01-27-2015, 09:51 AM
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#6
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Full Time Adventurer
2007 27' International CCD FB
Nomadic
, USA
Join Date: Jul 2013
Posts: 2,748
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Actually it's becoming norm to put those stupid Goodyear Wranglers on trucks, P metric or passenger rated tires. It provides a smoother ride. Most folks who buy 1/2 tons are not serious like someone who posts on a forum asking for questions. By that, I just mean that you're probably already ahead of the average truck buyer.
My Ram 1500 came with brand spanking new Good Wrangler SR-A's 275/60/20's they are P metric. The reviews online are not encouraging, they're soft and mushy. The ride however is very smooth. Heavier load range E tires would provide a harsher ride.
They haven't been terrible while towing, but I don't like them all that much in the rain even when not towing. I'll probably replace mine at some point.
Those with a 17 inch rim, are in luck and can easily switch to a Load Range D or E tire.
I can only get a load range E in my tire size by buying an A/T tire or going up one tire size to 275/65/20.
Ugh.
__________________
Family of 5 exploring the USA with a Ram Power Wagon & Airstream in tow.
OUR BLOG | INSTAGRAM
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01-27-2015, 09:58 AM
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#7
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Rivet Master
2008 25' Classic
Full Time
, Texas
Join Date: Nov 2012
Posts: 4,309
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5300lbs payload on those tires greatly exceeds the rear and front GAWR of an F150 even with HD Payload Pkg. I'd use them until they wore out.
Kelvin
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01-27-2015, 11:11 AM
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#8
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TinCan
2016 30' Classic
Apache Junction
, Arizona
Join Date: Aug 2011
Posts: 880
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Speaking of tires and wheels I was thinking of keeping my 15" rims but still go with a LT tire. I believe Michelin makes such a tire. What would be the pros and cons of doing this?
__________________
TinCan
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01-27-2015, 11:27 AM
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#9
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Rivet Master
2009 23' FB Flying Cloud
Canmore
, Alberta
Join Date: Nov 2013
Posts: 1,762
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Quote:
Originally Posted by graysailor
Speaking of tires and wheels I was thinking of keeping my 15" rims but still go with a LT tire. I believe Michelin makes such a tire. What would be the pros and cons of doing this?
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Your trailer weight would exceed maximum with 15 inch Michelin LTXs. These tires are rated 2150 lbs at 50 psi. Derating by 10% for trailer use would reset their rating to 1935 lbs each for a total of 7740 lbs.
GVWR on a 30 foot Flying Cloud is >8000 lbs, you would need to upsize to 16 inch if you want to go to LTX tires.
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01-27-2015, 11:48 AM
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#10
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Always learning
1972 29' Ambassador
1962 19' Globetrotter
1951 21' Flying Cloud
Central
, Texas
Join Date: Oct 2010
Posts: 2,881
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Quote:
Originally Posted by graysailor
Speaking of tires and wheels I was thinking of keeping my 15" rims but still go with a LT tire. I believe Michelin makes such a tire. What would be the pros and cons of doing this?
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There are many threads on this question you posed.
The 15" Michelin LTX M/S2 is a "P" 235/75/15. Not enough tire for you in my opinion.
Here are two 15" options that would work.
http://www.tirerack.com/tires/tires....omCompare1=yes
Nokian Rotiiva AT LT235/75/15
__________________
Lance
Work is never done, so take time to play!
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01-27-2015, 01:04 PM
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#11
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Master of Universe
2008 25' Safari FB SE
Grand Junction
, Colorado
Join Date: Sep 2007
Posts: 12,694
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Even back in '07, our new Tundra came with Goodrich P tires, Load Range C. I never looked until I had the truck for a while and was surprised to see passenger tires. I should have looked because maybe I could have bargained for LT's. They were crappy tires that wore fast. I replaced them with Michelin LTX Load Range E tires—they rode better and lasted 70,000 miles.
I think they have found a way to not have the "P" on the tire so they can fool people into believing it is a real truck tire. I thought there were federal regulations about the markings so I'm wondering how they got around that.
Gene
__________________
Gene
The Airstream is sold; a 2016 Nash 24M replaced it.
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01-27-2015, 02:16 PM
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#12
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Rivet Master
2013 25' FB Flying Cloud
Longmont
, Colorado
Join Date: Jan 2012
Posts: 1,105
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Michelin also has non-P tires
I just bought new tires for my TV. 275/55R20 size. While shopping, I noticed that Michelin offers two versions of LTX M/S2 in this size. One is P275/55R20 111T. The other has no P: 275/55R20 113H. The local tire store said what was also said earlier in this thread: The non-P tire is a "Euro Metric" spec tire.
The other interesting thing about Michelin is their web site does not abide by the defined load ratings such as 111 and 113. According to DiscountTire.com, 111 load index equals 2403 pounds load rating, but Michelin lists the max load as 2185. For 113 (2535 rating), Michelin says 2304 pounds. So it looks like Michelin is doing the "derating" calculation.
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01-27-2015, 02:21 PM
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#13
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Rivet Master
Currently Looking...
Vancouver
, British Columbia
Join Date: Oct 2012
Posts: 4,566
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Quote:
Originally Posted by SSquared
The other interesting thing about Michelin is their web site does not abide by the defined load ratings such as 111 and 113. According to DiscountTire.com, 111 load index equals 2403 pounds load rating, but Michelin lists the max load as 2185. For 113 (2535 rating), Michelin says 2304 pounds. So it looks like Michelin is doing the "derating" calculation.
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The "P" designation is used by the TRA organization. The "P" is not used by the ETRTO organization.
The two organizations use different load index calculations.
Tire code - Wikipedia, the free encyclopedia
Jeff
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01-27-2015, 03:09 PM
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#14
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Rivet Master
1999 30' Excella 1000
small town
, Maryland
Join Date: Sep 2010
Posts: 802
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Quote:
Originally Posted by ROBERT CROSS
OMG.....GYM's for TV's.
Bob
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I should know better not to read the posts while drinking. It's o.k. just water...the hair drier will dry off my laptop. I'll put saran wrap on my keyboard from now on... Thanks Bob
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01-28-2015, 06:20 AM
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#15
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CapriRacer
I'm in the
, US
Join Date: Sep 2012
Posts: 989
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A couple of thoughts:
1) Both the Europeans (ETRTO) and the Japanese (JATMA) omit the letters in front of their passenger car tires. They both have versions of LT tires, but they aren't consistent with the US practice in their marking of those types of tires.
2) As far back as I can remember, ALL the pickup manufacturers have been using P type tires on their 1/2 ton PU's. The use of LT tires on 1/2 tons is a relatively recent phenomenon (circa 2000).
3) While it is surprising to see Ford use a non-US tire sizing nomenclature, I wonder if this has anything to do with global integration. Vehicles are being designed all over the globe, and I wonder if the tires and wheel part was farmed out to a non-US location.
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01-30-2015, 06:08 PM
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#16
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3 Rivet Member
2004 25' Safari
1999 27' Safari
1968 17' Caravel
Fountain Valley
, California
Join Date: Mar 2011
Posts: 111
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Tire recommendation
I started out with a 17' Airstream so only got a 1/2 ton pickup. Later I got a 27' Airstream (actually 27' 11") and continued to pull it with the same 1/2 ton pickup. Without going into all the specifics, I wound up rolling the 27' Airstream a couple years later. I did not let the wife drive the truck pulling the 27 footer because I didn't feel it was safe for her to pull (even though it had all the right equipment, anti-sway, load levelers, etc.)
I subsequently purchased a 25' Airstream (with a different anti-sway system).
When it came time to replace tires on the truck I made what I consider to be a MONUMENTAL single improvement. I had been using the largest Michelin tires that would work for my 2005 Silverado. When I went to replace them I found that the 3/4 ton & 1-ton trucks use a different tire. Whereas the tires recommended for 1/2 ton trucks inflate at something like 44 psi maximum (don't remember exactly), the tires for the 3/4 & 1-ton pickups inflate to 80 psi maximum. I installed the higher pressure "Michelin LTX M/S 2, ALL SEASON, LT265/70R17 LRE ORWL, MSPN 97723" tires and could not believe the difference in towing. I believe that these tires may have made the difference in rolling or not rolling my previous 27' Airstream.
Everybody you ask gives you different recommendations on inflation pressures. I use the truck only when towing, so I settled in on 70 psi in the front, 75 psi in the rear, and 40 psi in the spare (obviously I didn't replace the spare).
I would still recommend a 3/4 ton truck if you go to the 27' (28') route, but if you are going to pull it with a 1/2 ton I definitely recommend you switch to higher pressure tires. They are costly (I think I paid about $1,300 for four tires), but they make a tremendous difference in towing safety.
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01-31-2015, 08:39 AM
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#17
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Master of Universe
2008 25' Safari FB SE
Grand Junction
, Colorado
Join Date: Sep 2007
Posts: 12,694
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Windy', you switched from Load Range C to Load Range E tires. Michelin recommended with Load Range E LTX Tires on my half ton Tundra that 42 front and 45 rear was appropriate, and add 3 lbs. for towing. The E tires will take 80 lbs., but it is not necessary to make them that hard for the load.
Gene
__________________
Gene
The Airstream is sold; a 2016 Nash 24M replaced it.
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01-31-2015, 09:35 AM
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#18
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Vintage Kin
Fort Worth
, Texas
Join Date: Nov 2006
Posts: 8,014
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Quote:
Originally Posted by WindyJim
I started out with a 17' Airstream so only got a 1/2 ton pickup. Later I got a 27' Airstream (actually 27' 11") and continued to pull it with the same 1/2 ton pickup. Without going into all the specifics, I wound up rolling the 27' Airstream a couple years later. I did not let the wife drive the truck pulling the 27 footer because I didn't feel it was safe for her to pull (even though it had all the right equipment, anti-sway, load levelers, etc.)
I subsequently purchased a 25' Airstream (with a different anti-sway system).
When it came time to replace tires on the truck I made what I consider to be a MONUMENTAL single improvement. I had been using the largest Michelin tires that would work for my 2005 Silverado. When I went to replace them I found that the 3/4 ton & 1-ton trucks use a different tire. Whereas the tires recommended for 1/2 ton trucks inflate at something like 44 psi maximum (don't remember exactly), the tires for the 3/4 & 1-ton pickups inflate to 80 psi maximum. I installed the higher pressure "Michelin LTX M/S 2, ALL SEASON, LT265/70R17 LRE ORWL, MSPN 97723" tires and could not believe the difference in towing. I believe that these tires may have made the difference in rolling or not rolling my previous 27' Airstream.
Everybody you ask gives you different recommendations on inflation pressures. I use the truck only when towing, so I settled in on 70 psi in the front, 75 psi in the rear, and 40 psi in the spare (obviously I didn't replace the spare).
I would still recommend a 3/4 ton truck if you go to the 27' (28') route, but if you are going to pull it with a 1/2 ton I definitely recommend you switch to higher pressure tires. They are costly (I think I paid about $1,300 for four tires), but they make a tremendous difference in towing safety.
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Genes point is correct. The half ton will operate better with closer tire pressure to spec. Weigh the truck at all corners with trailer hitched and WD applied, same load as if on a long trip.
Weigh it solo, with driver and usual gear aboard when not towing. Full fuel in both cases. All four wheel positions.
Then ask for pro advice on pressure.
The front axle tire pressure should probably be the same towing or empty if WD is adjusted correctly. It is the rear axle weights that will differ.
Pressure that is too high is bad for braking and maneuvering. Understeer is induced sooner. Adding plus five psi to Steer axle while towing is probably okay.
Don't rely on transitory response feeling when towing. Turn in will be slow as it has to account for the trailer axles to begin their turn as well. It is easy to overload the rear axle tires at this point. The truck, the trailer and the WD spring bridge must work together.
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