Primo's dual thickness solid sprocket is built simple with strength & durability as its standout features. Fully 3D CNC machined from 6061-T6 aluminium the Primo Solid Sprocket is strong, & durable without weighing an excessive amount. 19mm & 22mm top hat adapters are included to fit the sprocket to most cranks. section Product Specs TYPE: Bolt On
Material: Alloy WEIGHT: 90.7g (3.2oz)