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SRAM Powerglide 50T Chainring 110 BCD 10-Speed for 50/34 5-arm - NOS | eBay
SRAM Red D1 Dub 12-Speed 1x Aero Crankset 172.5mm, 50t Aero [00.6118.540.003] at BikeTiresDirect
Amazon.com : SRAM Force/Rival/Apex 50T 10-Speed 110mm Black Chainring Use with 34T : Bike Chainrings And Accessories : Sports & Outdoors