Look, Oval Ring Mounting Hardware Kit, Chainring Hardware

Shimano, XT SM-CRM86, Chainring, Teeth: 34, Speed: 12, Front, Aluminum, Black, ISMCRM86A4

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

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

Wheels Manufacturing, 3-Bolt Hyperglide+, Chainring, Teeth: 32, Speed: 12, BCD: Direct Mount SRAM 3 Bolt, Aluminum, Black

SRAM, 24T Chainring, 11sp, BCD: 64, Aluminum, Black