Stems

Stratos

Entry level in name only, the 4ZA Stratos stem is strong, light and durable. Designed and tested in the real world lab of Belgium.

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Cirrus

The 4ZA Cirrus stem provides peace of mind with lightweight and rigid construction. Designed and tested in the real world lab of Belgium.

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Cirrus Pro

The 3D Forged high strength 4ZA Cirrus Pro stem provides top level performance in stiffness to weight ratio to the consumer. Designed and tested in the real world lab of Belgium.

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