Valve Parts

Modern deep section rims, depths greater than about 22mm, require longer valves.
Normal valves can be lengthened with extensions but it is important to know if your valve core is removeable.

Normally quality tubs and innertubes have removeable cores and a valve extension is fitted between the valve stem and the core.

Otherwise a different type of extension must be fitted over the core.
Either way, care must be taken when fitting!
NEVER tighten an extension or core without holding the base with pliers or damage may occur.