Full control of your valve, however deep your rim profile.

With this system, your original valve core is always at the top of the extension, unlike some systems which screw over the valve and leave the valve core unreachable inside the rim and require users to leave the valve open at all times.

Features

Can be used on any presta tube with a screw out valve (replaceable valve core) 
Available in 30 and 60mm depths
Two extensions per blister pack plus application tool
Can be doubled up to create a longer extension  
 

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