But why ride so close together?

Riding ‘on someone’s wheel’ as it’s called gives you the benefit of slipstream. Riding close enough to the person in front of you can save you as much as 15-40% of your energy, depending on the speed and size of the group, which enables us all to maintain a higher average than we could on our own.

The following links give some more information about riding in a group:

http://www.britishcycling.org.uk/insightzone/features/article/izn20121221-group-ride-0

http://www.ctc.org.uk/article/cycling-guide/group-riding

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