Happybuying88 Bike Chainring Sprockets Cranksets Guard Protector 4 Bolts 74mm Size: 8 bolts, 74*74mm&101*101mm Function: Prevents chain from jumping to the outside Color: Showed in the picture Material: Engineering Plastics How many teeth of Cranksets? What size you can measure the diameter of the adjacent holes? Then you can choose which one you can buy .