Tannus Armour Tire Insert 29 x 2.6 3 Single Fits Brand Blue 174mm Q Factor 44mm Chainline flat mount brake 174mm Q Factor 44mm Chainline Rings 50 40 Number of Chainrings Double Drivetrain Speeds 12 Chainring BCD 90 Chainline Hub Compatibility 135 142 Road Disc Hubs > 415 mm Chainstay Color Black Crank Length (mm) 165 Crank Intended Use Gravel Weight 650 BB Included No Pedal Spindle 9 16" Spindle Interface Type 386 EVO Defined Color Black Crank Length 165Mm Chainring Size 50 40T Micropores in the otherwise solid polymer evenly distribute just enough oil to keep the bearing well lubricated Whether you are a city biker adventure tourer or prefer the off road downhill or gravel trails Tannus Armour gives you increased grip and vibration dampening for a smoother more comfortable and enjoyable ride Patented Aither Technology