The ornamental design for a collapsiblebicycle, as shown and described.
1. Collapsible bicycle
1.1 : Right
1.2 : Left
1.3 : Front
1.4 : Back
1.5 : Top
1.6 : Bottom
1.7 : Perspective
1.8 : Perspective
1.9 : Perspective
1.10 : Perspective
1.11 : Exploded
1.12 : Exploded
The design for a collapsible bicycle; figure 1 is a right side view of the assembled collapsible bicycle; figure 2 is left side view thereof; figure 3 is a front elevational view thereof; figure 4 is a rear elevational view thereof; figure 5 is a top plan view thereof; figure 6 is a bottom plan view thereof; figure 7 is a right front perspective view thereof; figure 8 is a left front perspective view thereof; figure 9 is a right rear perspective view thereof; figure 10 is left rear perspective view thereof; figure 11 is a right side view of the disassemble collapsible bicycle; and figure 12 is a left side view thereof.