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- Unique alternating Thick-Thin tooth profile for excellent chain retention
- Fully CNC machined with 6061-T6 aircraft aluminum alloy for lightweight strength
- Certified to ISO 9001:2008 standard
- High performance chainrings at great prices
- Compatible with 8, 9, 10 and 11 speed or single-speed drivetrains
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USAmade 104mm 30 Tooth 2017 Sharktooth Collection Mountain Chainring Black Anodized Finish 4-Bolt Improved 2016 Design Threaded for standard M8x0.75 chainring bolt alternating thick-thin tooth profile for excellent chain retention. Our rings are designed to use 3/32″, 9 and 10 speed chains. – Made in the U.S.A.