Shimano 105 5703 triple 10sp chainsetlightweight hollowtech ii 105 10 speed chainset slim body line smooth rotation optimum balance of light weight stiffness front index is superior shifting performance please note bottom bracket is not included features innovative hollowtech forged and anodised aluminium crank arms utilise a hollow design that minimises flex and keeps the weight low the triple chainring teeth have been developed to work in conjunction with the cn 5600 chains for improv