Subrosa Rear Hub Guard type: slide-on rear non-drive side (NDS) material: cnc machined 4140 heat treated chromoly diameter inner hole: 14mm thickness: 15mm at axle hole | 25mm reach outer diameter: 72mm how to install: remove cone nut, slide on axle between hub and frame color: black additional information: replaces cone, designed for use with Subrosa posi trac cassette hub