I have three brand new chainrings for sale: Zipp 53 tooth, only 88g, 130BCD and 9 or 10 speed compatible. (Brand new take off from Zipp 300 crankset) $50 shipped Ultegra 6600 (10 speed) 53/39 set, 130BCD, $50 shipped
Or Best Offer, or open to trades…