Fraction of the total moment of inertia carried by the crustal superfluid reservoir (﹩{I}_{{\rm{sf}}}^{{\rm{cr}}}/I﹩) as a function of neutron star mass. (a) Dependence on the symmetry energy slope L₀ for both PKDD (solid lines) and DD-ME2 (dashed lines) interactions. The gray horizontal line marks the value required to explain the glitch step size of the 2016 Vela event. (b) Dependence on the effective mass ﹩{m}_{n}^{* }/{m}_{n}﹩, showing how stronger entrainment (larger ﹩{m}_{n}^{* }/{m}_{n}﹩) systematically reduces the available angular momentum reservoir. These trends directly determine the equilibrium glitch step size Δν_eq.