On the 06 I've got the factory brakes that I guess are a little bigger than the pre-05 trucks (as well as drum out back with the 9.5" 14 bolt) ... I was looking at mine just yesterday thinking about that Brembo big brake kit with the 16.1" rotors. The 22" Centerlines I've got have the valve stem inside the hoop, at near the center line of the wheel. If I go much larger in rotor, the wheel is going to fit fine, but the caliper is going to end up hitting the valve stem. Might be do-able if I go to a stubby-style stem or even use some bolt-in types that go in at an angle like you see on dually wheels. BTW I've noticed a lot of 22" wheels use a similar hoop design with the valve stem inside.
For what it's worth, a 15"~15.5" rotor is about maximum you're going to fit inside most 20" wheels. Here's the Hellcat Brembo setup, 15.4" rotors and 6 piston calipers, on the front of my 300. The wheels are 20x9.5" OEM Hellcat as well. Plenty of wiggle room but no room to safely go bigger. (the original front brakes on this car are a 14.1" rotor and 4 piston caliper.)
Edited by someotherguy, 11 May 2018 - 07:39 PM.