Questions tagged [innertube]

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

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59 votes
2 answers
20k 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 ...
Michael's user avatar
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56 votes
13 answers
38k 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, thinner ...
Jared Harley's user avatar
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51 votes
9 answers
55k 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 ...
Will's user avatar
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50 votes
11 answers
114k 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 ...
Brock Boland's user avatar
  • 1,119
32 votes
10 answers
38k 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 ...
Anthony K's user avatar
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28 votes
8 answers
123k 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 ...
TheOne's user avatar
  • 381
28 votes
4 answers
22k 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 ...
Joe Phillips's user avatar
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25 votes
8 answers
26k 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 ...
Will's user avatar
  • 1,075
25 votes
11 answers
63k 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 ...
Moab's user avatar
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23 votes
7 answers
8k 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?
Johan Dahlin's user avatar
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23 votes
4 answers
70k 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 ...
Peter Bridger's user avatar
22 votes
11 answers
9k views

How to find punctures in inner tubes?

When I have a flat tire, I find punctures in inner tubes using three techniques, all starting with the inner tube outside the bike: Hearing where the sound of air escaping originates. Feeling the ...
Santropedro's user avatar
22 votes
7 answers
78k 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 ...
Tom77's user avatar
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21 votes
4 answers
5k views

Tyre exploded while riding

I was riding my bike today and it suddenly exploded. I have attached a picture. The tube was not over inflated and I haven't been riding on rough surfaces. What happened? Was the tube or tyre faulty? ...
linkyndy's user avatar
  • 461
21 votes
7 answers
15k 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 ...
Duncan McGregor's user avatar
20 votes
10 answers
10k views

Why using a puncture repair kit instead of a new inner tube?

I am a casual rider (~30 km commute as often as possible) in an urban setting. Reading this SE site to learn about biking (the resource is extraordinary, even though I don't understand every ...
WoJ's user avatar
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20 votes
9 answers
55k views

New high quality tire doesn't sit evenly on the rim

It's my first tire change experience and I got so far using youtube videos but now I'm stuck. Got these Schwalbe 365 tires yesterday for my folding bike. It is an all season model which feels a bit ...
AlexStack's user avatar
  • 303
20 votes
6 answers
2k 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?
Johan Dahlin's user avatar
  • 2,888
18 votes
8 answers
6k 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 ...
parisminton's user avatar
18 votes
13 answers
13k 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. ...
Imran-UK's user avatar
  • 281
17 votes
6 answers
25k views

What does vulcanizing solution in patch kits consist of? Can I buy it?

I have a pile of old patch kits for inner tubes that are complete except for the little tube of "vulcanizing solution" that comes in patch kits. With time, these tubes crack, or have a cap fail to ...
mako's user avatar
  • 395
17 votes
3 answers
905 views

How can an inner tube literally *dissolve* itself inside a bicycle tire?

[Excuse my English. I’m German and don’t know all the specific technical terms.] Today, I tried to inflate my tire, but while taking off the cap, the entire valve rotated with it, as if it wasn’t ...
user avatar
16 votes
5 answers
8k views

Technique for self-adhesive puncture repair patches

Is there any special technique for using self-adhesive puncture repair patches? Today, I've had two different tubes fail within a minute of being inflated because the air pressure had split through ...
David Richerby's user avatar
16 votes
3 answers
14k views

New wheel. Does it need that little rubber lining between it and the tube?

I recently replaced my rear wheel (hooray for figuring out how to remove the cassette). Now I am about to put the old tube in the new wheel. I noticed the new wheel doesn't have any rubber lining to ...
colorlace's user avatar
  • 263
16 votes
8 answers
11k views

Mystery flat keeps happening 3-5 times a week. Do I weigh too much for my tires?

This is a little embarrassing, so I hope no one makes fun of me... But I am a big girl. I always have been. Very big frame, big shoulders, big head, hands and feet. My whole life I've been healthy and ...
rogue's user avatar
  • 255
16 votes
4 answers
13k views

Does the valve have to be straight when replacing a tube?

I've just replaced the tube on my bike and when I pumped it the valve wasn't particularly straight as can be seen in the image below. What I'm wondering is do I need to remove the tube and straighten ...
PriestVallon's user avatar
15 votes
4 answers
32k 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 ...
Manatherin's user avatar
15 votes
3 answers
20k views

Is it normal for a presta valve to unscrew into two pieces?

I have a Continental Road inner tube with a threaded presta valve. I also have a threaded bike pump which I screw onto the valve to inflate the tube. When I try to unscrew the pump, the uppermost ...
David Tuite's user avatar
15 votes
5 answers
1k 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 ...
Agos's user avatar
  • 685
14 votes
6 answers
36k 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, ...
chepukha's user avatar
  • 347
14 votes
7 answers
3k views

Are solid/tubeless tires worth using in Thorny areas?

I picked up riding over the summer as a way to save on gas and get into shape. The trouble is that I live in a somewhat rural area with woefully maintained roads/sidewalks and everywhere is lousy with ...
thegreatmoof's user avatar
14 votes
2 answers
6k views

Why does my inner tube have brown liquid inside? Now with internal photo

I flatted the front wheel going up a climb the other day - I heard the pop and the PSSSSHH, and I could see a geyser of pale "steam" or vapour coming out the puncture. I swapped out the tube for the ...
Criggie's user avatar
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14 votes
4 answers
19k views

Tubular Glue vs Tubular Tape

I'm looking into going for tubular tyres and I'm new to this part of the world. As far as I understand there are two main options to mount the tyre: 1. Tub Glue which sounds like kind of a pain in ...
LoomyBear's user avatar
  • 531
14 votes
1 answer
6k views

What powder is used inside an inner tube?

I just cut open an old inner tube I had laying around and noticed there is a white powder in there. What is it? Why is it there?
allyourcode's user avatar
14 votes
3 answers
125k views

Deformed/uneven/bumpy wheel/tire/tube, how to diagnose or repair?

My bike has a deformation in the rear wheel, almost surely not due to the rim. At some point the tire has a "valley", causing it to bump instead of rolling smoothly. I'd like to understand ...
clabacchio's user avatar
14 votes
3 answers
89k 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?
john heil's user avatar
  • 141
13 votes
11 answers
4k views

Does anyone patch inner tubes anymore? [closed]

Many years ago I bought a 100 pack of REMA round patches from Amazon. And back then you could buy patch kits for $1 that had a few patches, something abrasive to sand with, and a tiny tube of ...
Ablang's user avatar
  • 167
13 votes
5 answers
36k views

How long do inner tubes last?

I recently started biking again after taking about 2.5 years off. My bike has been sitting in my garage since then. I did a 30 mile ride as my first one back and I didn't replace my tubes beforehand. ...
drg's user avatar
  • 233
13 votes
3 answers
7k 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 ...
milesmeow's user avatar
  • 2,363
12 votes
7 answers
44k views

Heavy Rider (300lb+) - Please recommend a 26" tyre to avoid tyre pinch

I ride a hybrid on 26" rims currently fitted with hybrid tires. As I am 300lbs+ the rear tire runs permanently deformed/flat and the rims ride over the rubber causing tire pinch. Can anyone ...
Matt TC's user avatar
  • 121
12 votes
4 answers
2k views

Quality check for donated tubes

I receive a lot of donated inner tubes, which may be perfectly good. How can I check them with confidence and be assured of no slow leak, without damaging the tube or taking an extremely long time?
SamA's user avatar
  • 2,696
12 votes
4 answers
23k 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, ...
user899's user avatar
  • 121
12 votes
1 answer
11k 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 ...
ptpdlc's user avatar
  • 1,942
11 votes
3 answers
28k 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 ...
mikes's user avatar
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11 votes
6 answers
58k views

New inner tube bulges near the valve when inflated

I've installed a new inner tube in my wheel. I checked the tube doesn't make a knot. When I inflate the tube, it bulges near the valve, and this rubs against the brakes. REF tube: 32/47 609/642 ...
Pierre's user avatar
  • 213
11 votes
2 answers
2k 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 ...
ptpdlc's user avatar
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11 votes
3 answers
2k views

Why is the retaining nut ("thumbscrew") against the wheel rim for inner tube Schrader valves no longer used?

The Schrader valve retreats back into the inner tube because there is nothing to hold it in place against the wheel rim. Despite having an outer screw thread on the protruding valve nothing is there ...
Roger's user avatar
  • 111
10 votes
8 answers
24k views

Is there a way to completely deflate an inner tube?

I had a flat tire and replaced the inner 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 ...
Apreche's user avatar
  • 1,148
10 votes
4 answers
3k 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 ...
Goodbye Stack Exchange's user avatar
10 votes
4 answers
2k views

Why (and how) would someone steal only my innertube?

Upon my return from winter holidays, I found that someone had stolen the rear innertube from my locked bike. They took only the innertube: the rear wheel was still there, the chain correctly attached, ...
Felix's user avatar
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