SRAM, 50D, 11sp, BCD: 110mm, 5 Bolts, Force22 X-Glide, Outer Chainring, For 34/50, Aluminum, Black, 11.6218.010.001

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

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

SRAM, X-SYNC 2 Bosch Non-Boost, Chainring, Teeth: 38, Speed: 11/12, Single, Steel, Black

Wheels Manufacturing, Shimano DM HG+ Outboard, Chainring, Teeth: 30, Speed: 12, BCD: Direct Mount Shimano, Single, 7075 Aluminum, Black