This is another great application for all the racers out there, probably the non-racer too if you are simply trying to determine speed etc., using your tire diameter, gear ratio and RPM. While my onboard computer does this on track, I can use this to determine these speeds ahead of time by estimating average RPM's for the track I am running and so on. This helps make that last minute gear or tire change as well to try and gain that edge over the competition. This along with the developers other application "Cross Weight" means I am one step closer to leaving my laptop at home on practice / race days and only needing to take my iPhone / Touch to the track (which I do anyway). Great application, I hope the developer keeps 'em coming for us racers!
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