Abstract: A tape cartridge has a baseplate surrounded by a housing. Two hub pins are disposed within the housing substantially perpendicular to the baseplate. Each pin has top and bottom portions and a collared portion therebetween. The bottom portion of each pin is press-fitted into a mating aperture in the baseplate with the collared portion bearing against the baseplate. A large diameter tape hub is rotatably mounted on the top portion. The collared portions allow the hub pins to withstand heavy side loads without significantly deflecting from the perpendicular. Two large diameter tape hubs are rotatably mounted around the hub pins and improve the empty hub to full pack diameter ratios, and improve the resulting tangential drive force and tape tension profiles as the tape moves between the hubs. A back set of belt rollers includes a high-drag roller that engages the drive belt at a fixed wrap angle and produces a relatively constant drag.