Shimano, Dura Ace FC-R9100, 39T Chainring, MW, 11sp, BCD: 110, Aluminum, Black

Wheels Manufacturing, Shimano DM HG+ Outboard, Chainring, Teeth: 32, Speed: 12, BCD: Direct Mount Shimano, Single, 7075 Aluminum, Black

Truvativ, Chainring Bolt Kit, 4 Arm Single with Aluminum Guard, Black

SRAM, XX T-Type TQ, Chainring, Teeth: 34, Speed: 12, BCD: Direct Mount, Aluminum/Steel, Silver