Outer ring has mounting holes to accept Shimano Y1KN98080 chain guard
Replaceable chainrings
Chainguard model
Item Specifications Color Black Spindle Interface Type Square Taper JIS Pedal Spindle 9/16" Chainring BCD 104 Chainring BCD 64 Rings 48/38/28 BB Included No Crank Intended Use Mountain Defined Color Black Crank Length (mm) 170 Drivetrain Speeds 7 Drivetrain Speeds 8 Number of Chainrings Triple Chainline/Hub Compatibility 135/142 MTB Hubs