This size inner tube will fit the following tyre sizes: 16x1.75-2.125 or 16x1.75 or 16x1.90 or 16x2.00 or 16x2.10 or 16x2.125. Motorbike. Heavy duty Bicycle Inner Tube. Strong and durable this innertube is manufactured from butyl rubber and has a double seam around the valve.