- This handy storage seat has been designed to fit the GRX1200R, GRX1250Li, GRi1300R, GRi1350Li, GRi1500Li, GRX950 and the GRX950Li. Comes with a mounting bracket that is permanently affixed to the cart frame. The seat itself slips over the mounting bracket for those rounds when you know when you might get backed up on the Par 3s. Plenty of space inside the seat for golf balls, snacks, etc. The bracket does not interfere with the way the cart folds.