because only so many riders can fit the width of the road before having to start another group, the groups get separated and it gets hard to go from say the 2nd or 3rd group to the 1st
http://en.wikipedia.org/wiki/Drafting_%28aerodynamics%29
@peter_v started
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because only so many riders can fit the width of the road before having to start another group, the groups get separated and it gets hard to go from say the 2nd or 3rd group to the 1st
http://en.wikipedia.org/wiki/Drafting_%28aerodynamics%29