Shimano, Tiagra FC-4700, Chainring, Teeth: 50, Speed: 10, BCD: 110, Bolts: 4, Outer, Aluminum, Grey, Y1RC98050

SRAM, X-SYNC Eagle Aluminum 3mm F1, Chainring, Teeth: 30, Speed: 12, BCD: Direct Mount SRAM 3 Bolt, Bolts: 3, Aluminum, Black

Wheels Manufacturing, Chainring spacers, Bag of 20, Middle, 1.2mm, 10mm ID

SRAM, Rival E1 2x Direct Mount, Chainring, Teeth: 48/35, Speed: 12, BCD: Direct Mount SRAM 8 Bolt, Black

Look, Mounting hardware for SRAM E Tap chainrings

Shimano, XT SM-CRM86, Chainring, Teeth: 34, Speed: 12, Front, Aluminum, Black, ISMCRM86A4