We ran the G60-15 McCreary's on my sons Dart and it ran just as fast on them as it did on slicks that day. His Dart ran 11.66 on the McCreary G60's and 11.68 on 28 x 9 M/T slicks. The slicks were taller as the G60 McCreary's were about 26" tall but it hooked great on them. I believe they even said "Dirt tires" on the sidewall somewhere but we drove the streets on them and raced on them with good results all the time. I dont know if the American racer are the exact same tires though. Ron