SRAM, Red E1 1x DM, Chainring, Teeth: 40, Speed: 12, BCD: Direct Mount SRAM 8 Bolt

Truvativ, 22T, 9 sp, BCD 64mm, 4-Bolt, Inner Chainring, For MTB triple, Steel, Black, 11.6215.064.000

SRAM, X-Sync, 28T, 11sp, Direct Mount 3mm Boost, Chainring, For single speed, Aluminum, Black

Works Components, SRAM GXP Direct Mount, Chainring, Teeth: 32, Speed: 12, BCD: Direct Mount SRAM 3 Bolt, Front, 7075-T6 Aluminum, Black