I know this is an old post but just wanted to let whoever is looking to get 295/60R20 ridge grapplers, I had them test fit on my 2015 sierra stock rims with a 2.5” lift today. The front had plenty of room at full lock but the rear of fenderwell would need the Norcal mod. Even tried with a 1.5” spacer(I know not recommend) just to see.