This size inner tube will fit the following tyre sizes: 26x2.10-2.40 or 26x2.10 or 26x2.125 or 26x2.25 or 26x2.35 or 26x2.40. Motorbike. Heavy duty Bicycle Inner Tube. Strong and durable this innertube is manufactured from butyl rubber and has a double seam around the valve.