Look, 36T, 11sp., BCD: 110mm, 5 Bolts, Inner Chainring, 3292

SRAM, X-SYNC 2 107mm, Chainring, Teeth: 40, Speed: 12, BCD: 107, Bolts: 4, Single, Aluminum, Grey

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

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