PROMAX SQ-1 SINGLE SPEED CRANK SETThe SQ 1 cranks arms have a traditional, five arm, 110 bolt pattern spider and come in a variety of lengths to fit most riders or riding situations, from the young BMX racer to the 6 foot tall fixie riding hipster. 110mm BCD Compatible with any JIS square taper bottom bracket Cold forged from 6061 T6 aluminum for strength, low weight and durability and feature beautiful anodized finishes Bottom bracket sold separately Chainline with 113 BB: 42. 3mm Q