[Thomaskov]

I have a 2019 WB redeye. I’m trying to run my 18” rims so have to change out my 6 pistons. Will the new 4 piston brakes/rotors bolt right on or will also I need to buy 2020+ Spindles ? These are my two options, I’d rather go with the newer if it’s a straight bolt on nothing else

 

[Turd McGavin]

I swear these are the only cars on the planet that people put "Smaller" brakes on

 

[2ndgen]

Pretty sure the spindles are all the same through MY2020.
MY2021 changed the spindle for the newer 15.7" rotors and calipers.

 

[Sarna March]

The only drawback of smaller rims, and it is a small drawback if it is a problem at all, is that there is more "squish" available from weight on the tire, such as bumps, landing after a small jump, etc.

Larger wheels ONLY benefit brake rotor diameter, and are a general drawback in all other senses, including worse ride, more weight, and more cost. The more sidewall, the more traction both laterally and longitudinally. Dragsters with unlimited budgets are not running 24" wheels. NASCAR only switched to 18" wheels from 15's due to "keeping up with a more modern look for the cars."

I think people could carve corners, accelerate, and brake more efficiently with 18" or 17" wheels. The Dodge Demon somehow hasn't killed anyone by having 18" wheels and the attendant smaller-diameter brakes.