ROTOR INspider® MTB Shimano® Compatible powermeter is one of the most sophisticated MTB power meters on the market, now compatible with Shimano® MTB cranks: XTR 9100, XT 8100 and SLX 7100. The competitive advantage over other spider power meters compatible with Shimano® cranks would be the BCD 100x4, which allows the use of chainrings starting from 30T, even oval ones. The new INspider® MTB Shimano® Compatible also stands out for its lightness, weighing 99 g without counting the chainrings.Upgrade now your Shimano® cranks with ROTOR.