●104 BCD Chainring Round Narrow Wide Single Bike Chainring for 8 9 10 11 Speed Mountain Bike Road Bike MTB BMX. ●The narrow wide tooth design increases the grip of the bicycle chain, effectively protects the frame from scratches, extends the service life and reduces friction and noise. ●Material: high-quality aluminium alloy, anodised surface, bright colour, corrosion resistance. ●Weight:32T/45g,34T/50g,36T/60g,38T/65g.Package Includes:1 x 104BCD Narrow Wide Chainring;4 x Single Chainring Bolts ●Suitable for Shimano and Sram 104 mm BCD cranksets, please check whether your crank BCD specification is correct before purchasing.