The stages power meter g2 105 5800 crank is an evolution in the 105 line with slight changes to graphics but the base crank and meter remain the same as the 5700 stages power has an impressive range of adaptation over the industry39s aluminum crank models this range puts power meters within the reach of every performance minded rider from road to triathlon to mountain bike and track this power meter replaces the non drive crank arm for existing 105 model cranks riders looking to