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

SRAM, X-Sync 2 Eagle 3mm Offset, Chainring, Teeth: 38, Speed: 12, BCD: Direct Mount, Single, Aluminum, Gold

SRAM, Bosch DU38 XX T-Type, Chainring, Teeth: 34, Speed: 12, BCD: Direct Mount Bosch DU38, Steel, Black

SRAM, 50T, 10 sp, BCD 110mm, 5-Bolt, Outer Chainring, For 34/50, Aluminum, Black, 11.6215.197.060

SRAM, X-SYNC 2 SL XX1 Eagle Lunar Grey 3mm, Chainring, Teeth: 30, Speed: 12, BCD: Direct Mount, Single, Alloy, Grey