E-Thirteen E*Spec Direct Mount Brose S Mag Boost 11 & 12V Black Chainring

Our new e*spec direct-mount chainrings use our new narrow-width M3 tooth profile, which reduces weight without sacrificing chain retention. Making our SL and UL chainrings lighter and better looking than their predecessors, we’ve adapted a similar design to work with Brose motor configurations.Details Optimized for Brose S Mag engines. Material Aluminium 7050. Chain line: 53 mm (Boost). New M3 tooth profile with reduced width eliminates chain noise and reduces overall system wear. Direct-Mount Brose. Weight: 117 g (34 teeth).