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Quarq’s power meter technology is reliable, accurate and easy to use. Now available as a spider by itself as an easy upgrade for existing cranks. The Dfour and DZero models offer improved data transfer and frame fit compatibility.

• Quarq’s power meter technology is reliable, accurate and easy to use. Now available as a spider by itself as an easy upgrade for existing cranks. The Dfour and DZero models offer improved data transfer and frame fit compatibility.