FSA`s rendition of the Narrow/Wide chainring for 1x10/11 drivetrains Features longer teeth and diamond shaped alternating profile to keep constant chain contact Longer tooth profile helps to reduce noise and quickly shed mud High grade anodized AL7075/T6 construction 104mm 4-bolt 38T 7075AL Black 10/11sp Narrow/WideUPC/EAN/GTIN: 400310072771