 The specifications of the M16 were similar to those of the M3 Half @-@ track . It was 21 ft 4 in ( 6 @.@ 5 m ) long ( with a wheelbase of 135 @.@ 5 in ( 3 @.@ 44 m ) ) , 7 ft 1 in ( 2 @.@ 16 m ) wide , and 7 ft 8 in ( 2 @.@ 34 m ) high and weighed 9 @.@ 9 short tons ( 9 t ) . It had suspension consisting of vertical volute spring suspension for the tracks and leaf springs for the wheels . 
