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Oval chainrings work because the rider does not produce power evenly through the pedal stroke; they maximize the part of the stroke where power is produced and minimize resistance where it isn't. You will actually feel your stroke to be more "round" with an Oval shape than with a round chainring.
Race Face Narrow Wide Single Chainring is now improved with performance-enhancing chain retention technology. Manufactured from T6-7075 aluminium for superb strength and durability, the Narrow Wide Single Chainring is burly...
Shimano XT M8000 Chainring The Shimano SM-CRM81 Single Chainring XT M8000 is a dedicated 1x11-Speed chainring specifically for the Shimano XT M8000 crankset.XT chainring features Dynamic Chain Engagement technology, which...
Shimano SLX FCM665 9 Speed Double ChainringsGenuine replacement middle chainring for the Shimano SLX Crankset
Shimano XT Chainring Outer M761 Chainrin Shimano chainrings for LX- and XT trekking cranksets FC-M581, FC-M761 and FC-M771.