Shimano, Dura Ace FC-R9100, 50T Chainring, MS, 11sp, BCD: 110, Aluminum, Black

SRAM, X-SYNC 2 107mm, Chainring, Teeth: 42, Speed: 12, BCD: 107, Bolts: 4, Single, Aluminum, Black

SRAM, X-Sync, 3mm offset, 30T, 12sp., BCD: Direct Mount, Single Chainring, Aluminum, Black

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

SRAM, X-Sync 2 Eagle 3mm Offset, Chainring, Teeth: 34, Speed: 12, BCD: Direct Mount, Single, Aluminum, Gold

TRP, EVO 12 CR-M9050, Chainring, Teeth: 30, Speed: 12, BCD: Direct Mount, Front, Aluminum, Black