Amazon.com : Shimano Sora 3550 34t 110mm 9-Speed Chainring, Black : Sports & Outdoors
Amazon.com : Inkesky 6/7/8 Speed Bike Chains - 116 Links - 1/2 x 3/32 Inch - Compatible with Shimano/KMC/Campagnolo/SRAM for Road & Mountain Bike : Sports & Outdoors