X1 single chainset bb30 11 speed quality and durability combine in the sram x1 crankset to deliver consistent performance every time out featuring srams x sync tooth profile the x1 crankset is engineered for complete chain control each tooths thickness is cnc machined to work seamlessly with the chains inner and outer links and with five available chainrings you can personalize your gear range to match the way you ride cnc machined 7075 two tone anodized x sync chainringan integral co