This is a 10-speed unit and fits directly onto the bar

INSTRUCTIONS HERE

Their sleek design and fully ventilated rear mesh mean they stay comfortable and cool even on long days on the pedals

Made of thin steel and are nickel plated and heat treated for long use

absoluteBLACK Direct Mount Narrow Wide Chainring - SRAM Direct Mount - 3mm Boost - Oval - Black - 12 Speed Shimano - 30T Envelope Shipping This is a 10-speed unitabsoluteBLACK is dedicated to producing the world's finest oval chainrings and were the first to crack the code to discover the correct shape and 'clocking' to make an oval chainring work. They learned how to maximize the part of the stroke where power is produced and minimize resistance where it isn't. The oval shape smooths the delivery of power throughout the pedal stroke and improves efficiency and energy conservation. Many other brands have