Full Speed Ahead Gamma Pro Mega Tooth Chainring - 34t 82 BCD Steel 1 x 11-Speed Black. The Gamma Pro MegaTooths teeth are longer than standard with an asymmetric profile shape a diamond-shaped cross-section and a unique system of alternating thick then thin teeth. This allows for smooth chain engagement meaning that the chain always remains in close contact with the chainring to give you the most reliable and positive drive possible.Thick-thin tooth design for maximum chain engagementLong tooth profile enhances chain retentionHeat-treated forged steel for maximum wear lifeCompatible with Gamma Pro and Alpha Drive 1x crankset