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Inner tube – series of dot marks and a puncture, what has caused it?

6 min read

Asked by: Laura Nelson

Why does my inner tube keeps puncturing?

Punctures are generally caused by a small, sharp object (flint, glass, thorns) poking through the rubber and piercing the inner tube. Quite often the item stays lodged in the tyre – so if you don’t locate it and remove it, when you replace the inner tube it’ll only be quickly deflated by the very same little blighter.

How do I know if my inner tube has a puncture?


Quote from video: You're just carefully. Just go around in your water and wait until you see some bubbles. Okay bit of a close-up you can see the bubbles bubbling out of the tube.

What could cause a tear in the new bike tube?

Quote from video: With no problem so ever is this jagged longitudinal type of tear along the tube itself this is always caused by deep rapid depressurization.

How do you find a hole in a tire tube?

The tube: Tube damage can be difficult to spot. If you don’t see any obvious punctures or blowouts, inflate the tube to check for escaping air. To find very small leaks, bring the tube close to your face to feel for air or listen for a hiss, or submerge it in water and look for bubbles.

Why do I get so many punctures?

Punctures can be caused by a few different things – foreign bodies, sharp burrs on the inside of the wheel and riding style can all be responsible for these happening. The inner tube may be pinched between the tyre and the rim or the end of a spoke needs flattening or taping.

Why do I keep getting slow punctures?

Causes of slow punctures



Slow punctures are usually caused by driving over something sharp, such as a nail, screw or debris in the road. You can also get one by hitting a particularly nasty pothole or a kerb, which causes damage to the wheel rim or the sidewall within the tyre.

Is it worth repairing inner tubes?

Inner tubes can be quite expensive, and they’re easy to fix so it’s a good idea to mend them instead of simply replacing one and chucking the old rubber. If the puncture is not obvious, pump up the inner tube. Once inflated, it is usually easy to hear the air escaping.

How do you find a small puncture?

Many slow punctures are due to a leaking valve and you can easily check whether this is the case. Simply rub some soapy water around the valve after inflating the tyre and watch to see whether any bubbles form as air escapes.

How do you find a slow puncture?

How to spot a slow puncture

  1. Pulling- If you’re driving on a flat road and relax your grip on the steering wheel and notice the vehicle pulling to the left or the right, it’s a sign that the pressure is low in at least one of your tyres. …
  2. Vibration- Another sign of a slow puncture is vibrations from your steering wheel.

What is a pinched tube?

Pinch Flats (Underinflated)



Also known as “snake bites” because they show up as two tiny little punctures, side by side on your tube, pinch flats are the result of your tube being pinched between the road and your rim while you’re riding.

Why is my bike tire flat with no hole?

Damaged Valves



Your tires go flat due to valve damage, pinched Presta valves stem, or pinch flatting because you didn’t put enough air into it when inflating in the first place. It is vital to keep your bike tires properly inflated for the best performance and safety.

Why did my bike tire suddenly go flat?

Reasons Why Bike Tires Go Flat



Cuts caused by a sharp object. Valve stem failure or damage. Rubbed or torn wheel. Blowouts or over-inflated wheels.

What to put in tyres to stop punctures?

Quote from video: Back into your inner tube valve. After you've done that all you need to do is pump up your tire. As normal. But here's one that I prepared earlier and it's a continental ground sport race tire. And a

Are old tyres more likely to puncture?

Car Tyre Punctures – The Causes



There is one kind of tyre that is by far the most likely to get a car tyre puncture. That is an old tyre. New tyres have a thick tread – 8mm to be exact. Then the inner casing adds extra thickness.

How do I stop a nail in my tire?

Quote from video:

Can you put sealant in inner tubes?

Although you can use tubeless sealant in your inner tube, tube specific sealants are designed for your tube and they are going to last longer and do a better job at sealing punctures on your tubes. The best sealants made specifically for inner tubes are made by Slime and Muc Off.

What causes snake bite punctures?

The second type are impact, pinch or snakebite punctures. These happen when you hit a sharp edge, such as a pothole, and the inner tube gets pinched on the rim causing it to puncture. These punctures are characterised by the two parallel slits in the inner tube they cause, that give them their snakebite name.

How do I stop my bike tire from popping?

How to Stop Your Bike Tire / Tube from Popping (7 Tips)

  1. Check the Inside of the Tire for Sharp Objects. …
  2. Use the Correct Tire Pressure for Your Weight and the Terrain. …
  3. Replace Your Tires Every 2000 to 3000 Miles. …
  4. Invest in Good Quality Tires for Your Riding Style and Terrain. …
  5. Partially Inflate Your Tube When Changing a Flat.

How often should you replace bike inner tube?

An inner tube, inside a bike tire and not exposed to high levels of ozone or petroleum fumes (or UV light), can easily last 10-20 years.

How much does it cost to replace a bike inner tube?

Tubes tend to range from $50-$75 dollars, while tubeless can start at $100 for one wheel and go up depending on what type they’re buying. For an average rider over rough terrain there should typically be no more than two sets of new bike tires in their lifetime – so replacement is going to happen eventually!

How much does it cost to replace a bicycle inner tube?

$25 gets most bikes back on the road in a jiffy (includes a new inner tube and labor). Sometimes a flat may cost more, especially if an unusual inner tube or additional labor is required, such as if you have a bike with an internally geared hub or full chain case.