Carriage for a cantilever slidable gate, such gate being of the type provided with a guide rail fixed to a barrier framework and extended longitudinally according to an advancement direction, said carriage comprising: - at least one support base intended to be fixed to the ground, extended at least along an extension direction intended to be substantially parallel to said advancement direction; - at least two engagement elements mounted on said support base and placed one after the other along said extension direction; - multiple wheels, which are idly mounted on said engagement elements and which are intended to be inserted into said guide rail for slidably supporting said barrier framework; - adjustment means, which define multiple fixing positions along said extension direction and which are configured to fix at least one engagement element of said engagement elements in a selected fixing position of said fixing positions; wherein said adjustment means comprise: - at least one guide arranged on said support base and extended along said extension direction between two opposite ends of said guide, said at least one engagement element being slidably constrained along the guide in order to be placed in said fixing positions; - at least one fixing element engaged with said at least one engagement element and with said support base for fixing said engagement element in the selected said fixing position; wherein at least one of said at least two engagement elements comprises an elongated arm extended mainly along said extension direction and slidably constrained to said guide; said carriage being characterized in that said elongated arm is extended between a first end placed in said guide and an opposite second end which is placed outside said guide beyond the corresponding end of said guide, and at such second end is positioned at least one corresponding wheel placed beyond the corresponding said end of said guide; wherein said elongated arm is extended beyond the corresponding end of said guide as an extension of said support base according to said extension direction; wherein said at least one engagement element comprises a terminal body which is rotatably constrained to said elongated arm at said second end and carries said at least one corresponding wheel mounted thereon. said carriage comprising: - at least one support base intended to be fixed to the ground, extended at least along an extension direction intended to be substantially parallel to said advancement direction; - at least two engagement elements mounted on said support base and placed one after the other along said extension direction; - multiple wheels, which are idly mounted on said engagement elements and which are intended to be inserted into said guide rail for slidably supporting said barrier framework; - adjustment means, which define multiple fixing positions along said extension direction and which are configured to fix at least one engagement element of said engagement elements in a selected fixing position of said fixing positions; - at least one support base intended to be fixed to the ground, extended at least along an extension direction intended to be substantially parallel to said advancement direction; - at least two engagement elements mounted on said support base and placed one after the other along said extension direction; - multiple wheels, which are idly mounted on said engagement elements and which are intended to be inserted into said guide rail for slidably supporting said barrier framework; - adjustment means, which define multiple fixing positions along said extension direction and which are configured to fix at least one engagement element of said engagement elements in a selected fixing position of said fixing positions; wherein said adjustment means comprise: - at least one guide arranged on said support base and extended along said extension direction between two opposite ends of said guide, said at least one engagement element being slidably constrained along the guide in order to be placed in said fixing positions; - at least one fixing element engaged with said at least one engagement element and with said support base for fixing said engagement element in the selected said fixing position; - at least one guide arranged on said support base and extended along said extension direction between two opposite ends of said guide, said at least one engagement element being slidably constrained along the guide in order to be placed in said fixing positions; - at least one fixing element engaged with said at least one engagement element and with said support base for fixing said engagement element in the selected said fixing position; wherein at least one of said at least two engagement elements comprises an elongated arm extended mainly along said extension direction and slidably constrained to said guide; said carriage being characterized in that said elongated arm is extended between a first end placed in said guide and an opposite second end which is placed outside said guide beyond the corresponding end of said guide, and at such second end is positioned at least one corresponding wheel placed beyond the corresponding said end of said guide; wherein said elongated arm is extended beyond the corresponding end of said guide as an extension of said support base according to said extension direction; wherein said at least one engagement element comprises a terminal body which is rotatably constrained to said elongated arm at said second end and carries said at least one corresponding wheel mounted thereon.