Originally Posted by
nashrcracer
well I accidentally ordered a 7.5 instead of a 17.5 last year before Cleveland and would like to use it just because it's been sitting for a year. Just thinking about it. If anything it would give me some good practice before I get back to 17.5 12th scale open speedo. You know something slower to ease into it.

hadn't driven my 12th since snowbirds and I remember why I love 12th scale. Control rules. Got a bd in the car on setting 2 now, 1 didn't have anything with the 7.5 I can fell the difference with setting 2. but still think I'm out in left field.

Aim your rollout to be around 50mm (1.97"). That should give you some speed. With your tires at 1.70" (43mm), you can try 31/84.