TRAIL narrow-wide chainring: One of the lightest MTB narrow-wide chainrings on the market. Made of the 7075 aluminium with fully CNC machining. Trail chainring is compatible with 11-speed drivetrains and thanks to the special teeth shape it may be used as a single chainring without a chain guide. From 2016 Trail chainring will be available also in 30T size which is becoming so popular now.