The length of an inner tube valve generally depends on the rim height. Typically, the valve should be about 15 mm longer than the rim height to allow easy access for a pump.
Schrader valve (American valve):
Common lengths are 32 mm and 48 mm.
32 mm is suitable for most mountain bikes, while 48 mm is used for mountain bikes with deeper rims.
Presta valve (French valve):
Available in various lengths, including 35 mm, 48 mm, 60 mm, and 80 mm, depending on the rim height.
Principle for choosing valve length: The valve should generally be about 15 mm longer than the rim height to ensure it is easy to inflate.
✅ For wheels smaller than 18 inches, it’s recommended to use a curved valve, as it makes pumping and accessing the valve much more convenient.
✅ Note: The small letter after "SV" indicates the valve type — "c" stands for curved, and "s" stands for straight.
