Allpar says about the SRT-10:
"Big brakes, another Dodge Ram staple, are also modified for the 2004 Ram SRT-10. The standard ABS-equipped brakes are fitted with new 15-inch rotors on the front brakes. Rear brakes are modified Ram Heavy Duty with 14-inch rotors. Front and rear brakes feature unique red calipers. The new front fascia features NASCAR-inspired brake cooling ducts to provide plenty of cooling for track sessions"
You will have a hard time fitting even 18" wheels with a 15" rotor. Even the 13.8's on the back of my 1500 leave under 1/4 inch clearance with 17's.