Dodge does not make a 20" spare. The Brembo brakes on the Challenger SRT are the same as those on the Charger SRT. Remember, the Challenger is basically a slightly shortened 2-door Charger.

 

well I am glad that worked for you but the SRT has differant size wheels with the larger Brambo brakes Dodge says no doughnut spare was made for this application. Putting a full size 255/45ZR20 on a 20X9.0 wheel in my trunk-no I guess not.