But having a safe stem shouldn t mean limited sizing options that s why bontrager stems come in a wide variety of lengths and rises.
Mountain bike valve stem adapter.
Strong first light second and often not cheap bontrager has never cut corners when it comes to something as important to safety as a bike stem.
Now install the adapter by carefully threading it clockwise onto the valve stem s threads.
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The valve stem opens by unscrewing a knurled textured nut at the top.
The adapter effectively converts your presta valve to a schrader valve so that you can use a traditional air pump to inflate it.
They tend to hold air better than schrader valves.
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This is typically found in bicycle tubes on many road bikes and some mountain bikes.
Hi in this video i show how i pump inflate a mountain bike bicycle tire schwalbe nobby nic with presta valve.
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The pump i am using is a blackburn airtower 2.
Unlike a schrader the system doesn t use a check valve it seals entirely based on pressure in the tube or tire.
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