Rotor S1 stem

Super-light stem with clever bolt technology

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Rotor made a name for itself with its eponymous cranks and elliptical

The DTT bolts resemble basic set screws except that each end uses

One thing is for certain: our Rotor S1 sample stem is seriously

Inexperienced mechanics will want to take some care during installation,

Otherwise, Rotor's new S1 has emerged as one of our favorite ultralight

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