Surly Narrow Wide X-Sync Ring 28t 58mm BCD Stainless Steel MFPN=TB72910000 ISIS is a splined interface

ISIS is a splined interface bottom bracket/crank design used by Truvativ FSA Raceface and other brands

}Wheels Manufacturing 1mm Spacers for 30mm Spindles Pack/10

}Wheels Manufacturing Derailleur Hanger - 21

Stiff and strong

Brake Caliper Type Post Mount Brake Lever Actuation Short Pull Defined Color Black Hydraulic Fluid Type Mineral Oil Rotor Included No Weight 205

Surly Narrow Wide X-Sync Ring 28t 58mm BCD Stainless Steel MFPN=TB72910000 ISIS is a splined interfaceSurly Narrow Wide X Sync Ring 28t 58mm BCD Stainless Steel. Surly X Sync ChainringsSRAM licensed X Sync technology Narrow wide tooth profile positively engages chain for better performance with single chainring drivetrains 304 Stainless Steel TECH SPECS Tooth Count 28 Ring Position Type Inner Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds Single Speed 3 32" Chainring BCD 58 Color Silver Defined Color Silver Material Steel