sbv32

We don't currently tow much bit will be in market for a pull behind in the next year or so. At the end of the day if I am spending money on tires and wheels I don't want to shoot myself in the foot when it comes time for the pull behind. I don't need the larger tires as it's mainly for my own personal preference. At the end of the day I don't have a problem keeping it stock size of it is overall a better benefit

Norotso

IMO the 10ply LT-E are over kill for a F150, personally I'm putting on some 6ply LT-C tires, best of both worlds and my TT weighs in @ 6200# loaded

sbv32

I will definitely look into that. Don't know what's available in the bfg ko2s so will look. Thoughts on the 1inch larger with the gear ratio change

Norotso

I'm sure the KOs only come in 10 ply, if it was me I would try towing with stock first then you have a base line. Lots of guys tow with less gearing, just comes down to what you are willing to live with, you dont know what you dont know....

smokeywren

Don't worry about tire size or even wheel size. Worry about tire revolutions per mile (revs/mile). Some tires for 18" rims are taller than some tires for 20" rims. Don't try to guess. Get the specs for your exact size of tire so you will know the exact tire revs/mile. The taller the tire the fewer revs/mile. The percent change in revs/mile = the percent change in rear axle ratio, and speedo/odo/trip-meter accuracy, and engine RPM.


Example: Your size P275/55R20, 657 revs/mile, 3.55 axle ratio:


P275/60R20, 633 revs/mile = 3.7% taller = equivalent to 3.42 axle ratio. Notice that higher middle number in the size reduced the revs/mile.


LT315/50R20, 641 revs/mile = 2.4% taller = equivalent to 3.46 axle ratio. Much wider but just a smidgen taller than stock, so maybe a possibility for you if you can fit them under your fenders on required 8.5" to 11" wide rims. http://www.tirerack.com/tires/tires....omCompare1=yes

P315/35R20, 725 revs/mile = 10.4% shorter = equivalent to 3.92 axle ratio. These are Toyo high performance street tires for a Corvette. They require wheels at least 10.5" wide and up to 12.5" wide. Probably not an option for you because of clearance restrictions.
https://www.toyotires.com/tire/patte...l-season-tires

sbv32

Thank you for this reply. I have used this info to educate myself and now have a better understanding. Now my next piece of business is to figure out what moving to the 60 series tire making my effective gear ratio a 3.44 will do to my towing and power for the truck. I don't really want to go that wide of a tire.

mass-hole

I am on a 275/60R20 Wrangler Duratrac which is a 33" tire on stock suspension and wheels. they did take my weathertech mud flaps off the first time i turned so they are close. A guy on the other forum is running a 34" 275/65R20 BFG KO2 on stock 2013 suspension and wheels with no rubbing and his tires cleared his weathertech mudflaps for some reason. 2014's use the same front suspension as the 2015's, so that could be why he was able to fit a bigger tire.

I honestly would not go any wider than stock if u are planning on just driving on the street. I didnt notice a difference in MPG's even though I went to the taller, more aggresive tire and I think that is probably because I didnt go any wider. Power difference will be minimal. As stated above, the change is 3.7%. If you truck needs more power it will just downshift, thats why we have 6 gears. But chances are that you wont even notice such a small difference as 3.7%. A strong headwind would make more of a difference than that.

sbv32

Right on. Ordering the ko2s at 275/60/20 and the fuel throttle or lethal (can decide) and going with a +20 offset. I have 30 days on the tires so if not a fan will assess then

redcelica

Yeah Im running 285/65/20s and looking to step down to 275/60/20s for better final gearing...and better mpg!

acdii

Well, after going through the numbers while buying a trailer, what I found that is most critical has nothing to do with wheels or tires, but the trucks payload and curb weight with the driver and full tank of fuel. I bought a light trailer, GVWR is 7600, with a full FWT and all our stuff it comes in just over 6200#, with a 760# tongue weight. I have a 1470# payload, with me, full tank of gas, and the topper, I am down to under 1000# payload. With the loaded trailer, and the generator loaded in the truck that leaves me with less than 200# left for passengers.

So it would make no difference what my tires and wheels are, I can only tow so much before I exceed my trucks ratings that it would make little or no difference. Depending on what you were thinking of towing, look first to see if your truck can handle it before dumping a lot of cash into wheels and tires.