Eclat Onyx Sprocket Seatclamps The MX1000 brakes are now 5SUML252W The MX1000 brakes are now available as a complete brakeset from us based on the same proven rubber as the popular Donnasqueak but with an all over smoother tread for more grip and sidewalls which sits further round the side of the wall for better grind performance The Onyx is a super tough sprocket from Eclat which uses cold forging technology to help radically increase strength over a traditional CNC machined sprocket stronger than CNC machined sprockets runs on 24mm spindle supplied with adapters for 19mm & 22mm sinked adapter for better chain alignment