He's talking about the sprocket carrier, the thing the sprocket bolts to. Earlier ones are narrower. If
you use a later model carrier on an earlier model bike the tire will sit too far to the right.


"Substantial danger" means the person, by his or her behavior, due to mental illness: (a) is at serious risk to: (i) commit suicide, (ii) inflict serious bodily injury on himself or herself; or (iii) because of his or her actions or inaction, suffer serious bodily injury because he or she is incapable of providing the basic necessities of life, such as food, clothing, and shelter; (b) is at serious risk to cause or attempt to cause serious bodily injury; or (c) has inflicted or attempted to inflict serious bodily injury on another.