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Rotor S1 stem

Super-light stem with clever bolt technology

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Rotor expands into the lightweight component market with its new S1 stem.

Rotor expands into the lightweight component market with its new S1 stem. (Image credit: James Huang)
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Rotor's DTT bolts make it all possible.

Rotor's DTT bolts make it all possible. (Image credit: James Huang)
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The two-bolt faceplate is particularly sleek

The two-bolt faceplate is particularly sleek (Image credit: James Huang)
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The S1's beefy extension makes for a stiff feel.

The S1's beefy extension makes for a stiff feel. (Image credit: James Huang)
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DTT bolts are also used for the steerer clamp.

DTT bolts are also used for the steerer clamp. (Image credit: James Huang)
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Red or black: your choice.

Red or black: your choice. (Image credit: Rotor)

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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