Tech Talk
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The toe
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The toe is the angle formed between front wheels and the kart’s longitudinal axis. This angle is responsible for how fast the kart goes on straights, how it handles corner entry, and how tires wear.
Taking the distance between the front tires and that between the rear tires, toe angle can be calculated based on this formula:
TgA = (Lf – Lr)/2/ D
A = arctg ((Lf – Lr)/2/D)
TgA is the tangent of the toe angle; Lf and Lr are front and rear distance
between tires; D is tire wheel diameter.
Math aside, measuring toe by using alignment discs on the front hubs instead yields more precise and effective results.
Toe-out (negative toe angle) is when front tires are farther apart compared to rear tires, i.e. they are angled outwards. Vice versa, toe-in (positive toe angle) is when they are closer together than rear tires, i.e. they are angled inwards. Zero toe is when Lf = Lr, i.e. front tires are perfectlty parallel to the kart, just like rear tires.
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