Nederlands | English | Deutsch | Türkçe

Project Sports

Questions and answers about sports

Presta valve won’t let air in on a new tube

5 min read

Asked by: Jennifer Evans

Why is my Presta valve not pumping up?

A presta valve on some brands have removable valve cores. If the pump is good, and the tube is not punctured, then there are 2 more options: The removable core is not seated properly, and needs to be tightened with a valve core tool. The valve core is bad/leaking, and should be replaced.

Why is my inner tube not inflating?

You may be using the wrong head on your pump for your valve stem style, you may have the pump fitted incorrectly, you valve stem may be damaged, there could be a puncture in your tire, your pump may be damaged, or if you are going tubeless it is possible your bead may not be set correctly.

How do you inflate a new tube?


Quote from video: When you're ready to inflate impressive al you'll need to spit that and counterclockwise to the top of the threaded. Shaft.

How do I know if my Presta valve is broken?

Quote from video: So there's a couple of ways to tell if your presta valve is stuck and or the core is damaged the first one is this you go to unscrew. It. And when you push down on the valve to test.

Why is my tire not inflating?

The tyre is punctured or torn



This is the most probable cause, yet it could be surprisingly hard to diagnose. Punctures could be caused by an external object (such as a screw or a roofing nail) perforating the tyre, creating a small hole in the rubber through which the air could escape.

How do you burp a Presta valve?

Quote from video: Head there basically you just stick it on you know it works straight or Presta. But loosen up our tip there as far as it'll go got a little sealant in there.

How do you fix a Presta valve?

Quote from video: Clean it off but to replace one you take your new Presta valve drop it in and spin to the right. Take your tool drop it over the Presta valve. And spin to the right. All right to air the tire. Up.

Can I ride with broken Presta valve?

The pressure in the tube should be sufficient to hold that seal for a ride. A drop of oil in the hole may assist. But carry a spare tube just in case. Yes just the knob and a miniscule amount of the stem.

How do you inflate a Presta valve without an adapter?

How Do You Inflate a Presta Valve without an Adapter?

  1. Remove the valve cap. Find the place on the valve cap where it gets smaller. …
  2. Unscrew the valve on the tire.
  3. Place the modified cap upside down on the tire and screw it down a few twists.
  4. Attach the pump and inflate.


Why will my bike TYRE not pump up?

The connection to the valve should be air-tight. A little escaping air is normal when attaching the pump, but shouldn’t continue for long. If it does, remove and reattach the chuck. If it continues to be a problem it may be worth checking the rubber seal in the chuck to see if it is worn out and needs replacing.

How do you pump air into a Presta valve?

How to pump a tire with a Presta valve

  1. Unscrew the valve cap.
  2. Loosen the brass nut at the top of the stem. …
  3. Put the smaller opening of the pump head on the valve. …
  4. Flip the pump head’s lever to close off the Schrader opening and attach the Presta opening to the valve.
  5. Pump until the gauge registers the desired PSI.

Do Presta valves need a special pump?

Presta valves are a lot narrower and are commonly found on higher end bikes with narrow rims. They are a little trickier to inflate as they use a manual locknut to open the valve for inflation. To inflate a Presta valve you’ll need a regular air pump and a special adapter.

How do you unclog a valve stem?

If the tire valve stem becomes clogged with Slime sealant, use a wet rag to wipe the area around the valve. Next, remove the valve core and use a wet cotton swab to wipe the inside of the valve and the O-rings on the valve core. Re-insert the valve core and inflate the tire.

Should you inflate tires cold or hot?

Presta Valve tips tricks and hacks

How do you fix a stuck Presta valve?

Quote from video: With pliers and just unscrewed it from here from the tube the old tube. Now I'm gonna take the new tube do the same again here's the tube.

Why will my bike TYRE not pump up?

The connection to the valve should be air-tight. A little escaping air is normal when attaching the pump, but shouldn’t continue for long. If it does, remove and reattach the chuck. If it continues to be a problem it may be worth checking the rubber seal in the chuck to see if it is worn out and needs replacing.

How do you fix a Presta valve?

Quote from video: Clean it off but to replace one you take your new Presta valve drop it in and spin to the right. Take your tool drop it over the Presta valve. And spin to the right. All right to air the tire. Up.

Why is my bike tire pump not working?

Simply, most bike pumps are not able to inflate your bike tire properly because of the air leaking. But also some of the causes might be the improper placement of the pump head, a leaky hose, or a worn-out pump. It might also be a seal that is damaged, and you might have to change it.

Is Presta better than Schrader?

Presta valves also perform better over time compared to Schrader valves, in that they hold air more effectively and don’t degrade as quickly. They can also hold higher pressures, which makes them a must for track cycling where tyre pressures typically exceed 120psi.

How do you inflate a new bike tire?

Quote from video: Important on a Presta valve you need to unscrew. This lock ring here. Before you can either inflate or deflate your tire. Once it's unscrewed. You press it in in the error.