The race face next sl direct mount narrowwide single chainring is designed and machined in race faces vancouver bc facility tested on the north shore and in the whistler bike park the chainring in strong made from 7075 t6 aluminium with a 4mm plate thickness to transfer loads without flexing the narrowwide tooth profiling ensures great chain retention and attaches as part of race faces cinch allowing you to switch between the direct mount and spider system really easily compatible with