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i-Drive stupid question?
I took my bike for a service and need new bearings for the i-Drive.
What does the idrive on the GT do?
[Mod. moved to MTB gear]
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The GT system is basically a single pivot.
The advantages of that are many, the disadvantages include changing effective chain length (unless pivots around BB) which leads to bio pacing and brake jack
The IDrive basically is a second pivot that lets the BB swing forward as the suspension goes up in such a away that the effective chain length stay the same and so does the distance between the seat and the BB
http://youtu.be/3dYlQYJTbVs
thanks mate.
After seeing this gentleman spins the pedals around a few times and lift the rear thingy part a few more, it's all clear now!