Amazon.com : Shimano 105 FC-R7000 105 Double chainset, HollowTech II 172.5 mm 50 / 34T, Silver : Sports & Outdoors
Amazon.com : Bicycle Groupset, 1 x 10 Speed Group Set -1x10 Speed Shifter Derailleurs Group for Mountain Bike : Sports & Outdoors
Amazon.com : SENSAH EMPIRE Pro GS STI Road Bike Shifters 11/12 Speeds Road Bike Shifters with Shift Cable,Double Speed Lever Brake Bicycle Derailleur Groupset Road Bike Speed Lever (EMPIRE Pro 2X12(carbon fibre)) :
Amazon.com : BOX COMPONENTS Box Two Prime 9 X-Wide Multi Shift Group Set Matte Black : Sports & Outdoors