Recently just purchased a set of wheels 20x10.5 +25 front and 20x10.5 +5 rear. I knew I could pull off the fronts since I know a few people running the same setup but I was unsure of what I was going to need to do for the rears, so I did some research of other cars and got a good idea of what I wanted. After receiving the wheels I test fitted the wheels with the natural camber of the car being lowered and to my huge surprise they tucked by about a credit card amount of space to spare. Mind you my fenders have been rolled and pulled but from just the natural camber of me being so low there was about -7 degrees of camber. I still had the camber kit put on the car but the specs stayed about the same. My current suspension setup is Bc coilovers with the extreme low option and they were just about maxed out in the rear. So to give you an idea of being slammed and the natural camber you can fit a 20x10.5 +5 with a roll and minor pull.
09 Cbp Accord Coupe 6-6 // Full exhaust // Takeda short ram intake // Custom Headlights w/dual halos & rgb demon eyes // BC coilovers // 20x10.5 +25 front/+5 rear Avant Garde F421 w/candy brushed turquoise faces & polished lips & hardware // Supgrade purple & chrome lug nuts // Jpower rear camber kit // TRS 6k headlights