Sitting between the standard 1:12 and the big display builds, 1:10 is a scale that turns up rather than being planned for. Kits appear when a manufacturer chooses the size for a particular machine. A 1:9 bike is so close in size that the two mix on one shelf without anyone noticing, while 1:12 carries by far the widest choice of machines. Both sit one click away: 1:9 motorcycle model kits for the same bulk in the cabinet, 1:12 motorcycle model kits for the standard size that nearly every chain, wheel and cowling upgrade is drawn for.