Bicycle Valve Stem Nut

Is there a consensus on where to install the 2 nuts that come on the inner tubes valve stem.

Bicycle valve stem nut. Yeah they re a thing. The valve stem opens by unscrewing a knurled textured nut at the top. Summary those nuts they include with presta valve tubes are unnecessary. Now the reason i have the extra nut and valve stem remover is cus i also carry a spare 21 tube pump co2 and some other stuff to either ride out with a flat or worst case either patch or replace the tube and its nice to have the extra nut to hold the valve in place when you replace a tube if needed.

A lock nut to secure the stem at the wheel rim and a valve cap may also be present. Likewise nut or no nut it seems that if the tube does shift it s going to tear at the valve stem. That s just about the end of any universal agreement on the subject though. Hand tighten the presta nut only and do not overtighten or you could pull the valve up far enough to puncture the tube.

Doing that can pull the valve stem too high into the rim and cause the valve to tear away from the tube and or cause a rip or puncture. The presta valve also called french valve fv or sclaverand valve is a valve commonly found in high pressure road style and some mountain bicycle inner tubes it comprises an outer valve stem and an inner valve body. I have just spooned on new heidenau and tube and have always placed the concave washer on the valve stem inside the rim one locknut outside the rim partway up the valve stem and used the second locknut to butt up to the valve cap to serve as a locknut. In today s post we ll dig through the debate so you can decide for yourself.

With a deflated tube the valve may slide inside the rim making it difficult to attach the pump correctly. Unlike a schrader the system doesn t use a check valve it seals entirely based on pressure in the tube or tire. If you don t have a bicycle pump that accommodates presta valves most allow both nowadays you could just screw on an adapter and inflate it using the pumps at the gas stations. The outer valve stem is manufactured in various lengths for different applications and has a.

Tongina 2 pack bicyle inner tube valve nuts with sealed o ring bicycle vacuum tire presta valve nut suit for most bicycles like mountain bikes road bikes 11 15 11. They tend to hold air better than schrader valves. Some riders swear they re actually handy others swear they re as bad as dork discs or chainring tattoos.