The sm-cre50 steps e5000 chainring from shimano features a symmetrical and narrower q-factor design for 9/10/11 speed drive units. The 3-piece design includes a square bottom bracket axle spline and the chainring is offered in 44t and 38t options. Symmetrical and narrower Q-factor than the current E6000 series Standardization and unification of the chain line for different systems 3-piece construction with square bottom bracket axle spline Chainring teeth: 44T, 38T Chain guard types: double, single or without chain guard Packaging: Individually packaged