The more steering you need, the more additive you use on your front tires.
* Repeated use of the same set of tires with additive can make them very soft. These tires can easily be damaged, they wear more quickly and
have higher rolling resistance. The best solution is to have several sets of the same compound of tire. You can then rotate these sets of tires to
prevent premature softening and they will give longer overall life.
Gear ratio charts
As it is often necessary to change tires and tire sizes to get the car dialled into the track, it is therefore important that you know exactly what
effect these tire size changes will have on the gear ratio. The following gear ratio charts equate motor gear ratios into linear distance travelled
along the track per revolution of the motor and by doing so take into consideration the tire size used.
How to use these charts.
Measure your rear tires, find the chart for the tire size, line up the appropriate pinion and spur gears used and the chart will then show you the
mm/rev travelled.
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The higher the number the further the car will travel per motor revolution, meaning it’s geared higher than a lower figure.
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Smaller pinions mean lower mm/rev settings and larger pinions mean higher settings.
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Smaller spur gears mean higher mm/rev settings and larger spur gears mean lower settings.
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Higher settings mean higher top speed (using more battery energy).
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Lower settings mean less top speed but more acceleration (using less battery energy).
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A too high gear ratio setting might damage your motor and cause excessive brush and commutator wear.
The gear ratio chart can be found in the following page 19.
18