Backspace, Bigger Tires, and Clearances:
We get a lot of questions about wheel choices. This should hopefully clear up some of the confusion people have, especially when dealing with IFS lifts. The backspace and rim width are the two critical items when selecting a wheel to go with an aftermarket lift. The backspacing will determine the clearance to the steering knuckle. This is very important, because too much backspacing will put the rim in contact with suspension components, and will vary by the rim sizeOften times the factory rim will go back on after a kit is installed, but only with a stock tire. You can see how much a tire overhangs the rim (tire bulge), this gets a lot worse when you go up to a 35 x 12.50 tire. The factory width tire on most of trucks is 275mm, which translates to 10.8 inches wide. Adding a 12.50 tire would decrease the clearance by almost 1 inch, and this is enough to make that combination not work. This is why we specify a certain width wheel (to eliminate some of the tire bulge) and a certain backspacing (to guarantee clearance to steering components).
Too little backspacing will put the wheel outside of the wheel well really far. This is great for suspension component clearance, but really bad for fender clearances. When the tire sticks out it is likely to rub on the bumper and backside of the front fender while the wheel is turned. Sometimes some creative trimming will fix this problem, but most people do not like to trim excessively on brand new trucks. The other problem with a wheel that sticks out really far is it increases tire scrub. This can cause issues with traction control systems as well as increase the wear on factory components.
If you are in love with a certain wheel, contact us with the specifications, check with us before you order them. We can let you know if you will have possible interference issues. Don’t be too upset when we say that you should think about a different rim. We have test fit lots of different rims and our listings represent the best specifications for getting the biggest tire on your truck.