The Shimano LX T661 Triple Chainset with sleek cap free design offers smooth & reliable performance at an affordable price point. The Hollow Tech II chainset features hollow forged crank arms which are lightweight, rigid & durable. Hollow Tech II integrated bottom bracket design uses a wide bearing placement with a large axle diameter for increased stiffness, efficiency & added durability. Mega 9 HG chainrings for optimum shifting performance, SG-X chainring with patented spike pins give smooth & fast gear shifts under load. Comes complete with bottom bracket for 68 & 73 mm frames. Available in 44/32/22 tooth or 48/36/26 tooth combination.