What's Inside An STI Lever? | Cycling Shift Lever Teardown

STI gear levers are something many cyclists take for granted, but, as cycling innovations go, the STI lever is one of the most intricately designed things you can find on a modern road bike! Join Alex as he takes apart both mechanical and Di2 Shimano levers to show you all the gubbins hiding inside them!

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Photos: © Velo Collection (TDW) / Getty Images & © Bettiniphoto / http://www.bettiniphoto.net/

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