How to Let Air Out of Bike Tires

How to Let Air Out of Bike Tires (Correct Way to Deflate)

Deflating bike tires might seem simple, but it is crucial to do it correctly to ensure optimal performance and longevity of your tires. Whether you need to adjust the tire pressure for a smoother ride or to fix a flat, understanding the correct way to let air out of your bike tires is essential. 

Well, worry not! In this guide, we will walk you through the step-by-step process of deflating your bike tires safely and efficiently and talk in-depth about all three tire valves i.e., Presta Valves, Schrader Valves, Dunlop Valves, and let you know the ways to deflate them. Well, to complete the task efficiently, please continue reading.

3 Types of Bike Tire Valves: Presta, Schrader and Dunlop

Presta Valves 

Presta valves are distinguished by their slim design and absence of external threading. They are lighter when compared to Schrader valves, which we will discuss ahead, and boasting a superior seal, Presta valves rarely suffer from slow leaks, a concern more commonly associated with Schrader valves. The best thing about Presta valves is that they excel in construction, quality, weight, and sealing capabilities, making them the preferred choice for high-end bicycles. The difference in performance and reliability is clear. It’s no wonder Presta valves are found on premium bicycles.

Schrader Valves 

To identify a Schrader valve, simply examine the valve on a car tire or bike priced under $1000. These valves are commonly used in affordable to mid-range bicycles due to their sturdiness, longevity, and user-friendliness.

They’re user-friendly and require a common pump, making them a popular choice for various bicycles and hassle-free maintenance.

Dunlop Valves 

Dunlop valves, also known as Woods valves, possess a distinct design featuring a rubber tube extending from the valve stem. Press the valve’s central pin to release air, similar to Schrader valves. These valves are common in certain regions and have their following due to their reliability and compatibility with various pumps. While less prevalent than Presta or Schrader valves, Dunlop valves are trusted by cyclists who appreciate their straightforward design and functional performance on various terrains.

Method to Deflating a Schrader Valve 

Want to deflate your Schrader valve? Well, we have got it covered. Here is a step-by-step guide on how to deflate a Schrader valve on a bike tire:

  1. To begin, determine the appropriate pressure you want for your tire/tube. If you’re removing all the air, skip this step and move on.
  2. Remove the plastic dust cap and keep it aside.
  3. Check the starting pressure and use a blunt tool or valve cap to apply pressure directly to the valve pin on the valve stem. Be patient and release air slowly rather than in massive amounts.
  4. Carefully watch the pressure gauge and slowly release the gauge pressure against the Schrader valve end so you hear hissing. Follow these general instructions for determining the air pressure removal process:
  • For minor pressure loss, release air in 1-2 second bursts using the gauge, and re-check the tire pressure. Repeat this process until you reach the desired pressure.
  • Release air in 2-5 second bursts for major pressure loss using the gauge. Recheck the pressure after each burst. Repeat this process until you reach the desired pressure. Once done, replace the dust cap.

Method to Deflating a Presta Valve 

You can release air from a Presta valve tube or tire by following these simple steps:

  1. Decide on the target pressure for your tire.
  2. Take off the valve’s dust cap.
  3. Unscrew the locking nut of the valve, ensuring it’s positioned at the top of the valve stem. Gently tapping it will release a small amount of air.
  4. Attach a Presta valve adapter. This adapter screws onto the Presta valve and allows you to use a regular Schrader air pump or pressure gauge.
  5. Check the pressure using a gauge. The gauge will press down on the valve, letting air escape.
  6. To release just a little air, depress the gauge slightly. If you’re removing all the air, just press the valve nut as described in step 3. You can skip the adapter if you’re fully deflating the tire. If you only need to reduce the pressure a bit, using an adapter and a gauge is the way to go. Using a gauge that fits without an adapter is even better.
  7. Once you’ve reached the desired pressure, remove the adapter and put the dust cap back on.”

This method should help you release air from your Presta valve tire easily.

Method to Deflating a Dunlop Valve 

Did you know that Dunlop valves have gained quite a following in Europe and certain parts of Asia? They blend the familiar Presta and Schrader valves you might have seen. Just imagine them as a bridge between the two.

Okay, here’s a simple way to pump up or let out air from Dunlop valve tires or tubes:

  1. First, figure out how much air pressure you want in your tire.
  2. Take off that little dust cover from the valve and keep it somewhere safe.
  3. Now, it’s adapter time. Pop an adapter onto the valve. Sometimes, a Presta valve adapter can do the trick, but don’t rush – check those threads to ensure they match up. We want to avoid any threading mishaps here.
  4. With the adapter in place, it’s like dealing with a Schrader valve. Have a pressure gauge ready and steady, and give that valve a quick check.
  5. Here’s where the finesse comes in. Give the valve a gentle push just to let out some air. Then, press that gauge snugly onto the valve to see how much air you’ve released. If it’s different from where you want it, no worries. Keep doing this until you hit that sweet spot of pressure.
  6. Adapter time is over. Take it off and cover up the valve with its dust cap again.

Easy peasy! You’ve got this from now on: inflating and deflating Dunlop valves is a breeze.

If you are done deflating with tires, and now you need to put air in tires here’s a guide for you – How to Put Air in Bike Tire at Gas Station.


Is there a Way to Completely Deflate an Inner Tubes?

You can completely deflate inner tubes, whether they have Schrader or Presta valves. For Schrader valves, a valve stem remover tool can be easily obtained to unscrew the valve core. Then, fold or roll the tube to remove air. Presta valves are not typically removable, but you can depress the pin to release air.

Folding the tube with the valve near one end and rolling it from the other can help. While unconventional methods like vacuum cleaners or valve tools can work, they’re less common. Keep in mind the valve stem tool can be improvised with narrow tweezers. Remember, safety precautions are important.

Can we use our fingers to Deflate a Bike Tire?

Yes, you can use your fingers to deflate a bike tire, but the ease depends on the valve type. Press the valve pin with your finger for Presta valves to release air.

Schrader valves require more care; using a pressure gauge or a flat-head screwdriver to depress the valve pin is better.

Deflating Dunlop valves with your finger is almost impossible; opt for a pressure gauge or screwdriver. Remember to exercise caution to prevent damage to valves and sudden air release. Proper deflation ensures safe riding conditions and helps maintain your tires.

Why do my tires Deflate between the Rides?

Tire deflation between rides can occur due to various factors, including the permeability of the rubber compound in the inner tubes, low-quality tubes, and issues with valves. Tubes lose air over time, which is accelerated by high temperatures. While all tires deflate to some extent, frequent and rapid deflation might indicate problems.

Key Factors:

1. Tube Quality: Inferior tubes may exhibit increased air loss. Brands like Maxxis and Michelin offer better air retention due to their quality materials.
2. Valve Concerns: Loose or damaged valves and poor valve-to-tube junctions can lead to leaks. Ensure the valve cores are tightened and intact.
3. Tube Inspection: Micro-punctures and deteriorated joints in older tubes could cause subtle air leaks. Submerge tubes in water to check for bubbles.
4. Temperature Impact: High temperatures, especially in garages, accelerate air loss. Park the bike right side up to gauge the deflation effect.
5. Tire Condition: Tire issues, not tube problems, can cause overnight deflation. Check tires for subtle damage or wear.

Regularly monitor tire pressure and invest in quality tubes to minimize deflation. If rapid deflation persists, consider consulting a professional or replacing the tube or the tire!

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *