Shimano, Y1LD98080, 32T, 9sp, BCD: 104mm, 4 Bolt, Deore FC-M590, Middle Chainring, For 22/32/44, Steel, Black

SRAM, X-SYNC 2, 32 Chainring, 12sp, BCD: 104, Aluminum, Black

Look, Mounting hardware for SRAM E Tap chainrings

SRAM, X-SYNC Eagle Steel 6mm F1, Chainring, Teeth: 32, Speed: 12, BCD: Direct Mount SRAM 3 Bolt, Bolts: 3, Steel, Black

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

Wheels Manufacturing, Shimano DM T-Type Outboard, Chainring, Teeth: 32, Speed: 12, BCD: Direct Mount Shimano, Single, 7075 Aluminum, Black