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| Scratch Race |
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Any race in which all riders cover the same distance from a mass start and the winner is the first rider across the finish line. Virtually all road races are scratch races. |
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| Single Track |
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A section of trail that's wide enough for only one rider. |
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| Sit in |
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To get close behind the rider immediately in front in order to draft. |
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| Slipstream |
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The area of lowered wind resistance behind a rider. |
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| Spin |
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To pedal at a very high cadence. |
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| Suspension |
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A system that absorbs shock on mountain bikes and some road bikes. |
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