ALBA OPTICS - DELTA - VZUM™ ALENS Lens Choice:LEAF Optimum Chainring Angle (OCA) &

Optimum Chainring Angle (OCA) & a recommendation of Optimal Chainring Position (OCP)

The Coated Bearings have races 75% harder than our Standard Bearings

Shimano ULTEGRA Front Derailleur

The Notio app gives you a precise breakdown of your speed and performance

ALBA OPTICS - DELTA - VZUM™ ALENS Lens Choice:LEAF Optimum Chainring Angle (OCA) &DELTA uses VZUM A LENS made from scratch resistant polycarbonate, with a non centred base 6 that enables fixed vision without side view distortion. The curve covers an optical cone of 180, providing excellent protection against the wind and strong light, that often reflects on other sunglasses creating an eye blinding effect. The shock absorbent, unbreakable material provides excellent resilience. FEATURES Ventilated VZUM lens Interchangeable VZUM