• ControlTech Ozone Carbon Stem

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Controltech Ozone Carbon Stem

When we set out to design the stiffest, lightest carbon stem we could we had to think outside of the normal design realm.

We present to you the O Zone, a unique 3K carbon monocoque stem with an hole in the center.

Carbon fiber allows us to make advanced shapes with no rules. This is the case with O Zone. The hole in the center reduces bulk and weight and gives a new design inspiration. To complete this jewel we equipped it with light titanium bolts.

It pairs perfectly with our carbon IPOST and WEPOST seatposts.


  • Length: various lengths available to suit you needs
  • Angle: 5 degree rise stem
  • Stack Height: 45mm
  • Steerer Diameter: 28.6mm
  • Handlebar: 31.8mm
  • Bolts: Titanium
  • Material: 3K Carbon
  • Weight: 139g(L120mm)

Buy Controltech Ozone Carbon Stem from Chain Reaction Cycles, the worlds largest online bike store

  • Delivery costFREE
  • Delivery toUSA
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
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Buying Guide

  • We've got everything you need to know in our buying guide.