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3,527 Posts
For those of you using Gearing Commander, keep in mind that it is reading wrong for our CBR250R right now. I have to change the tire circumference to 74 inches to get the same rpm vs mph that I have verified on my bike. On my bike 7000 rpm is 66 mph indicated, 67 actual. Dead on. Gearing Commander is a great tool but the stated circumference, or the stated gearing, one or the other, isn't matching up to the real world performance of our bikes.
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Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator
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Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator