How Many RPM's
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265s are the tire size. I have 4.10 and run a 285/75r16 tire and avg 19 @ 70 with 2200 rpm. too much rpm is about 3400. thats aprox 120ish mph with my set up. These here stroker's love high rpm and heat at lows. Remember to keep below 5psi boost about 2000rpm and she'll get good gas mileage.