• New Shimano Dura Ace FC-7700 9-speed B-39T 130mm bcd chainring.
• 53-teeth, alloy and made in Japan quality from 2002. 
• Will work with 6/7/8 and 9-speed systems.
• Fits lots of cranks.
• 40 grams/1.4oz.
• CR1816.
• FREE shipping in the USA.