I went from 15's to staggered 18's and it didn't change my mpg or speed at all.
Sent from my iPhone using Mustang Evolution
No engine/performance mods (yet). Mach 460 sound system, 2 12" alpine subwoofers in a custom box w/ 1800watt kenwood amplifier. Smoked halo headlights, smoked sequential taillights, black bullitt staggered rims, racing stripes, and plastidipped spoiler. Future exterior mods - Chin spoiler, black fuel door, and demon fender flares (plastidipped).