Kenda 20 x 1.25/1.5 (406) Inner Tube Schrader Valve

Kenda 20 x 1.25/1.5 (406) Inner Tube S/V

Specification:

Weight : 83 grams

Size: rim diameter 20 inches, tyre wdith 1.25 to 1.5 inches

Valve type: Schrader

Valve length: 34mm

Note :  The rim valve hole diameter for Schrader is approximately 8mm and 6mm for Presta.  So you cannot fit a tube with Schrader valve in a wheel that was made for Presta valve.  Unless you want to widen the hole with a drill - some bike shops will do this for you

How to choose your inner tube?

The inner tube markings is supposed to fit the tyre.  So check the tyre markings

Its says 20 x 1.35, meaning the wheel diameter is 20" and the width of the tyre is 1.35 inches

And sometimes you can also see the ETRTO (ISO) marking.  In the above case, its 32-406.  Meaning the witdh of the tyre is 32 mm and the rim diameter of the wheel is 406 mm. In fact the diameter to be precise is measured between the bead seat (BSD)

Note:  Important to note that 406 and 451 are both marked as 20" but they are different and not interchangeable

If you want to know more about innner tube sizing, visit

http://www.innertubeshop.com/pages/which-tube-fits-my-bike

http://www.kendatire.com/en/bicycle/

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