I have a 2016 Ford F150 Lariat Supercrew and would like to go to a larger rim and tire which would require a leveling kit. I know the larger tire will change the gas mileage but will it affect performance?

 

I have a 2017 Screw and just put a set of Rough Country 2" leveling spacers above the struts and upsized the tires from P265/70R17 to LT285/70R17 KO2's. The fuel mielage like you said has suffered, but because I have the OEM struts and shocks still on it, I do not see much of a difference in the performance. Maybe a slight bit of a power hit (3.31 gears, P rated tires were 31lbs and the KO2's are 57lbs each), but put it in Sport mode and do not see any difference at all. I chalk this up to throttle response between normal and sport modes.

The tiny bit of difference in performance (which is still pretty darn good) is far outweighed by the better look.

 

Sorry to derail the thread here, where'd you pickup that kayak rack from?

 

I did a level and installed heavy 34" E rated tires.

Saw an 8% loss in highway MPG.

Braking - You can feel the need for more pressure on the pedal.

Taking off requires a little more throttle but it actually softens the start with the 5.0 and it drives better.

It handles like a dream. Rides very planted on highway. Love the feel.

I would never go back to a stock truck. I like it that much.

Tires are Nitto Ridgegrapplers.



Pecked out on my iPhone.

 

I am in Canada and bought it at a store called Princess Auto (Very similar to Harbor Freight. It is a 2 piece which I have clamped to the rails as I did not want to drill holes in the rails. I then mounted "J" racks on it for the Kayaks. I originally had a Kayak rack attached which held 2 Kayaks which shared the center support, issue U was having was, when reaching overhead putting the Kayaks in place, they had a tendancy to slip off the rack as it was to flat. The "J" racks seem to be a lot more supportive and have not had an incident since.

Rack - https://www.princessauto.com/en/deta...ck/A-p8291528e

Clamps used -

J Racks - https://www.swagman.net/product/contour/

Hope this helps, let me know if you need anything clearer.