FIG. 1 is a perspective view of the supercharger roller shuttle of our new design; FIG. 2 is a top plan view thereeof; FIG. 3 is a front elevational view thereof; FIG. 4 is a back view thereof; FIG. 5 is an end elevational view of the left end thereof; FIG. 6 is an end elevational view of the right end thereof; FIG. 7 is a bottom plan view thereof; and, FIG. 8 is a sectional view taken along line 8-8 of FIG. 2.