The ornamental design for a tricycleframe, as shown and described.
FIG. 1 is a front perspective view of a tricycle frame, showing the new design;
FIG. 2 is a perspective view from the left rear thereof illustrating saddle and handlebars in broken lines;
FIG. 3 is a perspective view from the left front top thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a side elevation view thereof; and,
FIG. 6 is a folded side elevational view thereof.
The broken line showing the handlebar, tricycle stem, seat tube, seat, wheels and axle is for the purpose of illustrating environmental structure for a tricycle frame and forms no part of the claimed design.