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I ran 11" on a 10.60 @ 126 roadrunner back in the early 80's and it stopped fine on a short shut down. You have more stopping power with 11's of course but you also have a bit more surface feet speed per minute with the larger diameter drum. Another thing to think about is if you're running small tires on the front at the strip....you don't need a lot of brake on the front because you will just slide them across the stripe if you're bracket racing and are pushing it. Heck, it might be a good thing to have some fade on the front to keep that from happening