absoluteBLACK Premium Oval Chainrings for Shimano - Black Size:39t Works with both 10-50t and

Works with both 10-50t and new 10-52t cassettes

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Bar Width (Min): 720mm

40-60mm stems are available in block style only

Unidirectional carbon fiber cranks

absoluteBLACK Premium Oval Chainrings for Shimano - Black Size:39t Works with both 10-50t andabsoluteBLACK Premium Shimano 110 4 bcd compatible oval chainrings are designed for new type of Shimano cranks Dura Ace 9100, Ultegra 8000 & 105 R7000 only. These are finest oval chainrings on the market in terms of shifting, smoothness of pedaling and manufacturing quality. (They can be also retrofitted to 9000 and 6800 cranks). 10 11 12spd compatible. One of a kind special oval shape that helps you climb easier and faster (Patent Pending) Over 15%