Deity components alibi 4b sprocketthe deity alibi 4b sprocket is machined from high grade 7075 t6 aluminium and compatible with any 4b chainguide on the market lighter stiffer and stronger than a spider and chainring combo simplifies set up to any 4b chainguide with a 3 piece crankset counter stepped face for perfect spacing of your bash 4 mounting positions for increased teeth wear resistance 4b 104 format and machined for 89 speed chain direct mount any 4b bash without needing spac