Soon thereafter, in September 1976, the interim ST10 (only built for four months) was gradually replaced by the widened and lengthened ST20 pickup version which also has a longer wheelbase. Marketed as the Suzuki Carry Wide 550, it now reached the maximum dimensions set for the Kei class. In November, the ST20 Van took its bow - this version was shorter than the truck as it reused the shorter rear side bodypanels of the L50 and ST10 versions. Some special variants of the ST10 (such as refrigerated versions, panel vans, etcetera) remained on sale alongside the ST20 for a little while longer until new versions could be developed and old stock be sold out. There was also an ST20K model available: the "K" refers to the "trucklike" nature of the vehicle in that it had three drop-sides as opposed to the utility version which had only a tailgate and formed sides. The ST20 range retained the three-cylinder 539 cc two-stroke engine of the ST10 and has a carrying capacity of . Maximum power remained at 4500 rpm. In October 1977, after about 187,000 had been built, the ST20 underwent a light facelift, with increased equipment and all versions (excepting the base truck) now featuring a front grille.