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Originally Posted by BajaSportsmobile
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When we upgrade race trucks from 12.2" to 14" rotors without changing anything else; the brakes are significantly better.
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It's interesting that that big a difference in rotor diameter is the same as going from stock tires at 30.5-inch to 35-inch diameter tires. It's not perfectly linear as it affects braking "leverage" but it shows just how much difference increasing tire diameter can have beyond increasing ground clearance.
Obviously extra vehicle mass doesn't help either. My stock brakes/tires don't stop great at 7,000 pounds, so 10,000 pounds would make it that much worse.