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The Tangent Halo 4-bolt chainring is CNC machined in the USA from 4mm thick, 6061-T6 aluminum with large cutouts around the perimeter for the perfect mix of strength and weight. The Halo chainring uses a high tooth profile for accuracy and is designed for single, 7, or 8 speed chains.
Bolt Pattern: 104mm
Weight: 3.4 oz (44T)