A vehicle comprising: a sliding vehicle closure; and a roller assembly for said sliding vehicle closure, comprising: a bracket secured to the sliding vehicle closure, the bracket having a slotted aperture; a ball-type roller secured to said bracket at a location spaced apart from the sliding vehicle closure, said ball-type roller fixed in position relative to the sliding vehicle closure via said bracket during opening and closing thereof, wherein said ball-type roller supports the sliding vehicle closure on a corresponding surface of a vehicle body during opening and closing of the sliding vehicle closure; wherein the roller assembly further comprises: a guide roller rotatable secured to a guide roller bracket that is secured to said bracket at a location spaced apart from the associated sliding vehicle closure and adjacent said ball-type roller, wherein said guide roller is received in a track to guide the sliding vehicle closure during opening and closing thereof; the guide roller bracket and the guide roller are fixed in position relative to the bracket and relative to the sliding vehicle closure during opening and closing of the vehicle closure; said ball-type roller includes a housing mounted to said guide roller bracket; said housing includes a fastener having a shaft and said guide roller bracket is secured to said bracket by said shaft received through said slotted aperture, said slotted aperture allowing linear adjustment of a relative position of said guide roller relative to said bracket. a sliding vehicle closure; and a roller assembly for said sliding vehicle closure, comprising: a bracket secured to the sliding vehicle closure, the bracket having a slotted aperture; a ball-type roller secured to said bracket at a location spaced apart from the sliding vehicle closure, said ball-type roller fixed in position relative to the sliding vehicle closure via said bracket during opening and closing thereof, wherein said ball-type roller supports the sliding vehicle closure on a corresponding surface of a vehicle body during opening and closing of the sliding vehicle closure; wherein the roller assembly further comprises: a guide roller rotatable secured to a guide roller bracket that is secured to said bracket at a location spaced apart from the associated sliding vehicle closure and adjacent said ball-type roller, wherein said guide roller is received in a track to guide the sliding vehicle closure during opening and closing thereof; the guide roller bracket and the guide roller are fixed in position relative to the bracket and relative to the sliding vehicle closure during opening and closing of the vehicle closure; said ball-type roller includes a housing mounted to said guide roller bracket; said housing includes a fastener having a shaft and said guide roller bracket is secured to said bracket by said shaft received through said slotted aperture, said slotted aperture allowing linear adjustment of a relative position of said guide roller relative to said bracket. a bracket secured to the sliding vehicle closure, the bracket having a slotted aperture; a ball-type roller secured to said bracket at a location spaced apart from the sliding vehicle closure, said ball-type roller fixed in position relative to the sliding vehicle closure via said bracket during opening and closing thereof, wherein said ball-type roller supports the sliding vehicle closure on a corresponding surface of a vehicle body during opening and closing of the sliding vehicle closure; wherein the roller assembly further comprises: a guide roller rotatable secured to a guide roller bracket that is secured to said bracket at a location spaced apart from the associated sliding vehicle closure and adjacent said ball-type roller, wherein said guide roller is received in a track to guide the sliding vehicle closure during opening and closing thereof; the guide roller bracket and the guide roller are fixed in position relative to the bracket and relative to the sliding vehicle closure during opening and closing of the vehicle closure; said ball-type roller includes a housing mounted to said guide roller bracket; said housing includes a fastener having a shaft and said guide roller bracket is secured to said bracket by said shaft received through said slotted aperture, said slotted aperture allowing linear adjustment of a relative position of said guide roller relative to said bracket. a guide roller rotatable secured to a guide roller bracket that is secured to said bracket at a location spaced apart from the associated sliding vehicle closure and adjacent said ball-type roller, wherein said guide roller is received in a track to guide the sliding vehicle closure during opening and closing thereof; the guide roller bracket and the guide roller are fixed in position relative to the bracket and relative to the sliding vehicle closure during opening and closing of the vehicle closure; said ball-type roller includes a housing mounted to said guide roller bracket; said housing includes a fastener having a shaft and said guide roller bracket is secured to said bracket by said shaft received through said slotted aperture, said slotted aperture allowing linear adjustment of a relative position of said guide roller relative to said bracket.