Campagnolo Record 12-Speed Chainrings. These Campagnolo Record 12-Speed Chainrings are made for Campagnolo cranksets in addition to SRM and power2max Campagnolo power meters. While the outer chainrings are only compatible with Record 12-speed cranksets, the inner chainrings are compatible with both Record and Super Record 12-speed cranksets. These chainrings are made from an anodized aluminum and use a 145/112 BCD. Works with Campagnolo Record 12-speed cranksets in addition to SRM and power2max Campagnolo power meters. Works with Campagnolo Record and Super Record 12-speed cranksets in addition to SRM and power2max Campagnolo power meters. Bolts are included for both the large and small ring. Expert advice and customer service in case you need any help. At Power Meter City, we focus on power meters and related accessories and components. Our focus on these products means we can offer you the best possible selection, advice and service. We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell.