A rubber torus shaped balloon which is inflated via a valve inside a tyre to keep it rigid.

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35
votes
12answers
9k views

What type of tires can prevent goatheads?

We have a lot of goatheads1 in our area, and they have a tendency to do something like this to bike tires: Unfortunately, I ride a road bike (specifically a Kona Dew), so I have much smaller, ...
34
votes
11answers
26k views

Can I use a Presta tube in a Schrader rim?

I keep losing pressure in my tires, and among other things, I'm looking at the valves in the tubes. It's an old mountain bike with 26 inch tires. Can I use Presta tubes on rims drilled for Schrader ...
29
votes
2answers
2k views

What are the effects of completely filling tires with water instead of air?

As absurd as it sounds, I was curious as to how a bike would handle with the front tire filled with water. I wonder if steep hill climbs would be easier (particularly for a mountain bike): 1) to ...
28
votes
8answers
6k views

How long should a road tyre hold its pressure?

How long should a road tyre be able to maintain a pressure of around 100psi, and what factors are likely to reduce this time? Background: My tyre pressures are consistently dropping to around 60psi ...
21
votes
10answers
5k views

Do glueless tube patches work as well as glue ones?

Quite a few years ago I tried some glueless patches for repairing my punctured tubes while out on the road, and found that they rarely stayed on for very long. I know that technology has advanced a ...
17
votes
7answers
6k views

Does the plastic cap on a Presta valve serve any purpose once fitted to a rim?

I can see the use of the valve cap on a Presta valve when the tube is still packaged (it obviously stops the valve puncturing the tube), but does it do anything except look pretty (or not) once you've ...
17
votes
4answers
3k views

Is there a difference in having tires filled with CO² vs Air?

When you fill your tire with a CO² cartridge you are obviously putting CO² into it. When you use a pump you are putting air into it. Are there significant temperature variations that may lead to poor ...
15
votes
7answers
2k views

Is there a recycling program that accepts unrepairable inner tubes?

The local bike shop, not the wealthiest operation, has a pile of dead inner tubes growing on the floor. I'd love to discover something where used inner tubes are repurposed, melted down, made into ...
15
votes
7answers
1k views

Which kind of tube valve is the best?

What kind of valve is the best one, a Presta valve (6mm) or a Schrader valve (8mm). Which has the best reliability, which one is easiest to fix a flat on?
13
votes
9answers
9k views

Patch or replace tube?

Is it worth patching a tube on a mountain bike, or just replace it with a new one? There are a lot of 1/2" - 3/4" thorns here in Texas, and I use 26 x 1.95 tubes. Any particular patch type/brand ...
12
votes
3answers
1k views

Bike tires need air every ride…is this normal?

I ride my bike maybe once a week at most. I need to add air to the tires every time to bring it up to the right pressure. (I ride a mountain bike and I put about 45 - 50 PSI's into the tires.) Is ...
12
votes
7answers
1k views

How do I fix a puncture?

I got a flat/puncture on my bike tube, how can I fix it myself without going to the nearest bike shop? What kind of equipment would I need?
12
votes
2answers
1k views

Repairing Presta valves

This is the third time that I've had a leaking Presta valve on the tube. There must be a way of repairing the Presta valve rather than having to discard a good tube. Someone did it by applying glue, ...
11
votes
4answers
5k views

Should inner tube have excess length?

I've recently changed the default 700x35 tires and 35mm Schrader inner tube to 700x25 slicks with 25mm Presta inner tubes. However whilst fitting the new tire and inner tube, I noticed that the inner ...
11
votes
3answers
3k views

How do I use the plastic backing on patches?

It seems that the patches I buy for fixing inner tubes come in one of 2 types. Both have metal foil on the stick-to-tube side. One has paper on the other side, the other plastic. With the paper ones ...
10
votes
7answers
16k views

When should you replace tires after getting a flat?

A nail punctured my rear wheel tire today while riding. My question is, how do you know if you need to replace a tire or simply repair it with a tube repair kit? The hole looks pretty nasty. The cap ...
9
votes
4answers
3k views

Does the inner tube affect the maximum PSI?

If I have road tires that have a recommended pressure of 110 PSI and maximum of 120 PSI can I safely pump my tires up to that level or does the inner tube effect the maximum? I currently have the ...
9
votes
3answers
402 views

What happened? tube blew the rim?

Had a puncture today, removed the tube, patched it and made it home. Obviously since I only have a mini-pump I could not inflate it to my 8 bar usual pressure. When home, I took the wheel upstairs to ...
9
votes
3answers
669 views

What should I look for when buying tubes?

I wanted to buy a spare tube to carry while riding, but it appears there is wide choice: the first website I checked carried 92 items in the tube category, another one had 69, with prices varying from ...
9
votes
1answer
546 views

Benefits of latex tubes… Are they worth it?

Is using latex inner tubes worth it? My use of it would be on a racing bike, for training and racing purposes, only on road, mostly in good condition (but in an urban environment so there are some ...
8
votes
3answers
505 views

How can one prevent a tube from sticking to the inside of a tire?

I was cleaning my cruiser today, and as part of that I removed the tires from the rims to give them a good scrubbing. As sometimes happens, the tubes were stuck to the insides of the tires. (This also ...
8
votes
5answers
1k views

Slow leak on front cruiser tire

I ride my cruiser to the supermarket and back, using either a trailer or a basket over the front wheel for carrying groceries. The bike has developed a persistent slow leak on the front wheel, and ...
8
votes
10answers
2k views

Any alternative use for old mountain bike tyres and inner tube?

I have recently changed the original tyres and inner tube of my 15 year old Specialized Rockhopper. They were starting to deteriorate and I got punctures almost every time I took it on gravel paths. ...
7
votes
4answers
2k views

If I can't find the hole causing a flat tire, do I need to replace the tube?

My back tire got flat. If I pump it up now, it can hold the air for about 30 minutes to an hour before it's totally flat. I took out the inner-tube yesterday, pump in a bit air and put it into water, ...
7
votes
2answers
854 views

Relationship between punctures and tube pressure

What could be the relation between a bicycle's inner tube getting punctured and the pressure of the tube. Are they directly proportional? I.e, if the pressure of Bicycle tube is higher then it has ...
6
votes
3answers
732 views

Frequent blow outs in the same location

I keep getting blow outs in my front tube and always in the same location: right next to the valve stem. The blow outs look like: On this same tube, there is wear on exactly the other side of the ...
6
votes
5answers
4k views

Is there a way to completely deflate a tube?

I had a flat tire and replaced the tube. I just didn't realize that the tube was a thorn-proof tube when I bought it. It was the only spare one I had, so I used it anyway. Just now I replaced it with ...
6
votes
4answers
5k views

Can I use an inner tube that's too narrow for the tyre?

I recently got a puncture and when I went to replace the inner tube I discovered that I'd bought the wrong size tube. My tyre is 700 x 40c, the tube is 700 x 28-35c. What is likely to happen if I use ...
6
votes
1answer
2k views

Picking spare inner tube size

My daily rider is a Schwinn MTB with 26" wheels/tires. Specifically the tire size is 26x47/52. On the inner tube there's a label that reads 26 x 1.90-2.125. I'd like to purchase a few spare tubes in ...
5
votes
6answers
2k views

What is the easiest and quickest way to pump up a tyre?

I find that I need to pump up my tyres at least weekly and am looking for how to make this quick and easy. So what is the easiest and quickest method of pumping up a bike tyre? As an example, I ...
5
votes
2answers
6k views

Can I convert hybrid to mountain bike. Tyres and tubes?

I have a mountain bike looking frame with wheels that currently have road tyres. The bike is classified as a hybrid. My tyres state: 28" x 1.6 (42-622) The rim: ETRTO 622 x 18 I am having ...
5
votes
2answers
10k views

I have 27 inch wheels and need new inner tubes what size can I use

I have 27 x 1 1/4 inch tires on my bike and need to buy new tubes. Can I use 700c or just 27 inch?
5
votes
3answers
482 views

What factors influence the maximum tire pressure other than the tire itself?

On the tires of a bike, there is a label which shows the maximum allowed pressure for it. However, I am wondering if there are any other factors that affect the maximum allowed pressure in a tire? ...
5
votes
3answers
487 views

Damaged rim or just the tube valve?

I had a flat on the way to work today. Not really earth shattering, it was about 5 miles in, only a short walk until the office, where I could fix it in comfort. But walking the bike, I noticed an ...
5
votes
1answer
3k views

Complete beginner's question: inner tube too big?

My tire wall tells me that my tires are 26 x 1.95. I bought a 26 x 1.75-2.15 inner tube. When I change the inner tube, though, the tube is bigger than the wheel by two inches. How do I determine inner ...
4
votes
3answers
537 views

Is it normal to wear out the rear tire with in a few months when using a trainer?

Early this year I attached my bicycle to a trainer, around the December time frame of 2011. The rear tire and inner tuber where shot by March of 2012. Riding about 24 Miles per week. Is this normal ...
4
votes
3answers
2k views

how to repair large holes in inner tubes

I find that any hole, cut or tear larger than a pinprick is impossible to repair with normal patches because they are too soft. Even a 2-3mm slit will cause the repair patch to balloon out and burst ...
4
votes
2answers
55 views

Valve Extender for Kids Bike

I can't seem to fit my bike pump onto my son's bike. The tires are too small, and there isn't enough of a gap to put the head of a bike pump on the valve. Are there any valve extenders (not ...
4
votes
2answers
105 views

Why would tube patch sometimes peel off with backing?

Sometimes, when patching a tube, the newly placed patch will peel off when removing the backing. Sometimes I have this problem and sometime I don't and I'm not sure what the difference is. Is it the ...
4
votes
2answers
207 views

How many times to patch a tube before dumping? [duplicate]

Related: Patch or replace tube? This video asserts that: A properly patched area of a tube is stronger than intact tube area Never patch a tube more than 3 times Those are seemingly ...
4
votes
4answers
232 views

Which tube size to prefer if several options apply?

I have 40-622 (a.k.a. 28x1.5") tires, and Schwalbe offers two different sizes of tubes - their models "17" and "19" - as applicable for that tire size. Ok, either one would surely fit well. But ...
4
votes
2answers
227 views

Will Slick Tires Work for a Mountain Bike Ridden by a Heavier Rider?

I've owned a Trek 3500 bike (shown below) for 2.5 years now and I like it very much. My bike has the same specs as under the link. It has the XL frame size and 26" wheels with Bontrager AT-550 ...
4
votes
4answers
1k views

How should I store inner tubes to maximize their shelf life?

The LBS's in my area tend to have major sales around the same time once or twice a year. During this time, I can get replacement tubes at about half their normal price. I can buy several tubes, enough ...
4
votes
2answers
1k views

How to Patch a Bike Tube?

Related (but more general): What steps should I follow to patch a tube? I have done this more than a hundred times, but am still not sure what are the correct steps. Here they show to put glue ...
4
votes
3answers
168 views

Can small pebble inside tire puncture the tube?

Shortly after changing a flat in a dirt road near home, I got another one. This last tube got a very small puncture. Inside the tire I also found some small pebble (like 1mm or less in length), but no ...
3
votes
7answers
10k views

Why do my tires keep losing air, even after having the tubes replaced?

I had a problem a few weeks ago where my tires were flat and needed air every time I took my bike out of the garage. I brought it to the local bike shop, and they replaced my tubes. This made a ...
3
votes
2answers
2k views

Can I use a shock pump to inflate a tube?

I know that shock pumps are meant for high pressure applications so that they can withstand high pressures needed by suspension shocks. However, can I use a shock pump to inflate my tire in a pinch ...
3
votes
3answers
1k views

Air compressor to fill up to 60 PSI

I am looking for an air compressor and wish to get one which is not under or over powered. I am looking at one in a catalogue which has the following attributes: 40 Litres/min free air delivery 1hp ...
3
votes
4answers
576 views

“Quick Fix” Tyre Repair Spray Cans

I saw this in my local supermarket, as they are having a cycling event on at the moment. I was thinking this would be quite useful if I had a puncture away from home, the car or bike repair shop, or ...
3
votes
2answers
2k views

what is the ideal presta tube valve stem length

I have noticed that presta tube valve stems come in various lengths. I always assumed the longer valve stems were to allow the use of deeper aero wheels. Why is it that many wheels in print ads seem ...