Narrow Wide Steel Chainring - 40T. Narrow/Wide Chainring. Chainring Bolts NOT Included.
40T/56T Chainring w Cover BCD130 for Brompton Schlumpf Drive (H&H)
Aluminum alloy Bicycle Chain Guide For 32-40T Oval Chainring
Shimano Acera FC-M3000 40T-AX Chainring - 3x9 Speed - 96 BCD
40T Steel Chainring for Bosch Gen 3 Direct Mount - 53mm Chainline - 9-12 Spd
40T Spider & Chainring Set for Bosch Gen. 4 & 5 Ebike - 52mm Chainline - 9-12 Sp
Prowheel 104BCD 32T/34T/36T/38T/40T Round Chainring Narrow Wide 10/11 Speed MTB
