SRAM, 12SP X-Sync 2, 34T Chainring, 12sp, BCD: Direct Mount, 6mm offset, Aluminum, Black

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

Truvativ, 42T, 9 sp, BCD 104mm, 4-Bolt, Outer Chainring, For MTB triple, Steel, Black, 11.6215.016.000

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