I have a 2011 f150 4x4 screw with 3.73 gears. It currently has stock 275/60/r18's 31'' tires on it now. My plan is to put a new set of toyo open county at ll's in size 275/65/r18's 32'' tires on the truck shortly. I will be keeping truck suspension stock. From what i have read i should have no problems with rubbing. My question is will i a notice a difference in power when i put the new tires on and how can i calibrate the truck to the new tires?

Thanks

 

I am getting ready to get new tires also and searched the forums on tires and sizes. From the threads I have read you should not have an issue with that small of a bump up. Any more and you will notice a drag at start and mileage drop. I was going to go with the Toyo's but I feel they are overpriced for what they are. However I am going with the 275/60/20. I am going to give the Falken Wildpeak ATW3's a try. Can not beat the price.

 

Since you have 3.73s there shouldn't be too much of a power loss, and it may not be that noticeable.

You'll need a programmer to adjust the tire size/speedo.

 

I run Toyo's on my truck and like them.

As far as the OP's questions:

You shouldn't rub at all with that size. In fact, I would suggest going up to a 285/65/18 that measures out to 32.5". These would be about 1/2" wider and 1 1/2" taller than stock. It would be an overall difference of 4.87% in diameter. So, your 3.73 gearing would then be equivalent to 3.55 which is what a huge demographic of F150's come with stock.

Your fuel mileage would change a bit but likely not too much.

As far as calibrating the speedometer, go with the Hypertech unit and tune it in using a GPS. I did that with mine and it's dead on

 

A lot of 4x4's came with 275x65x18 as the OEM tires. I had them on my '04 Lariat 4x4...lots of room but if you go with a heavier LT tire you may lose some performance and fuel mileage vs the P rated tires.

 

I hate to ask for the cheaper version but what would be the cheaper version of the programmer or should i really get a good one? What would the benefit be of getting a good programmer compared to the cheap one just to change tire size and speedo calibration?

 

I don't want to hijack this thread, but I'm shopping for tires too. I'm planning on doing a 4" lift with some Nitto Trail Grapplers 295 / 60R20. I have 3.55 gears....How bad do you think it will change my mileage and performance? I'm already tuned, so that should help a bit.

 

Your definitely going to notice a difference in power and fuel mileage. Guys that have gone with that tire have lost about 2-3 mpg without a lift. You also have 3:55's which makes it worse.

 

That's what I'm afraid of..............

 

Nice! I am getting the AT3W's as well but in a 275/65/20 and should have them on tomorrow or Friday....pending they don't have any delays in getting the tires. They had to get them directly from Falken as no one had them around here. Still a very good price though and I hope I don't regret going 275 vs 295 (in another tire).