Product Description Chromag is the only MTB company officially authorised to manufacture chainrings with SRAM's X-Sync™ technology. Technical Information:Material:aluminium (7075-T6)Teeth:28, 30, 32Mount:direct mount (not incl. spider)Compatibility:SRAM Boost cranks (chainline farther out by 3 mm)Features:official SRAM X-Sync™ technology, meets SRAM compatibility requirementssensationally safe chain guidancebest possible self-cleaning of mud and sludgeCNC machinedblack anodised, laseredmade in CanadaTechnologyX-Sync™ X-Sync™ chainrings ensure maximum performance and durability. Long SRAM X-Sync™ tooth edges grip the chain earlier than standard triangular teeth. The sharp and narrow tooth profile and the rounded bevelled edges support the chain guide. To guarantee the best possible performance for muddy terrain, X-Sync™ chainrings have recesses for the inner chain links and rollers to remove dirt and mud. Manufacturer Numbers:28 tooth:151-001-05130 tooth:151-001-05232 tooth:151-001-053Contents:1 x Chromag Sequence chainring Manufacturer: Chromag Bikes 1121 Industrial Way Squamish BC V8B 0H1 Canada info@chromagbikes.com Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de