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

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1answer
48 views

What is the middleground between permatube and normal tubes?

I've burst my third tyre in two months on my MTB, each time it's caused by something sharp penetrating my tyre at high speed ripping a big enough hole in the tube causing the slime to leak out rapidly ...
5
votes
2answers
119 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 ...
0
votes
1answer
62 views

Tyre popped when going from 26 x 1.95 to 26 x 2.125

My wheel had 26 x 1.95 tyres. I bought 26 x 2.125 thinking it would fit. While fitting the new tyre, it bulged outside at one location and the tube also came out for about 7 inches. The tube is the ...
4
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2answers
129 views

What is mysteriously slicing the inside of my tubes?

For about the last year, I've had a problem keeping my bike on the road. Originally, my rear tube went flat when the tire was punctured by an office staple (don't ask me how a regular office staple ...
2
votes
1answer
159 views

What is the actual size of a 26x1.5/2.2 tube?

I've got some spare Specialized "Airlock" inner tubes that are size 26x1.5/2.2. That means 26 inch rims, but what does the 1.5/2.2 mean? It fits 1.5 to 2.2 width tires or something else? Curious what ...
4
votes
8answers
293 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 lol ... 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 ...
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2answers
50 views

What inner tube size to get for my road bike?

I want to get some spare inner tubes for my new road bike, but I'm unsure what size to get. On my tire it says the size is 700 x 25c and I know that 25 is the max width of the inner tube. So should I ...
3
votes
3answers
111 views

Do stocked tubes go rubbish over time?

I'm stocking tubes that I found in discount. One of my friends said that tubes get old over time. Do Butyl tubes do this? If it is true, what are storage tips for stocking them? And they came packed ...
3
votes
1answer
485 views

Is it normal for an Inner tube to bulge when inflated?

I recently bought a pair of inner tubes and when I partially inflated one of them before putting it into the tire (only a few pumps with a floor pump), I noticed a portion of it was bulging out ...
2
votes
1answer
58 views

Third tube puncture in 3 weeks

I have the 3-rd puncture of the rear wheel tube during 3 weeks. All of them have the same pattern: 1 small breach about 0.5mm long. I added the photographs of the last one. Bubble inside the water ...
2
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2answers
65 views

inner tube length size question

So I bought a used road bike from WI recently. and just a couple days ago i got a flat. I took out the tube wanting to patch but saw that it was all patched up. So i decided to just buy a new on. the ...
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3answers
92 views

Ideas for consistently popping tubes

I ride a cyclocross about 50 miles a week. About half of the mileage is spent on roads, the other half on single track trails. In the space of 3 weeks I have had the tubes pop 5 times. Once the back ...
4
votes
3answers
274 views

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

During a ride I had a flat tire and used a brand new Joe's tube with sealant. For the first time in many years of riding i was not able to pump air in. It appears that the pin inside the valve won't ...
1
vote
2answers
187 views

back tire keeps going down

I have just bought a new bike and had it about a month now. I don't really know much about bikes but I do know how to repair an inner tube. I have had one puncture and just bought a new inner tube. ...
1
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2answers
105 views

Using a wider inner tube

I am switching from 700cx40 to 700cx32. I have a bunch of inner tubes that I bought for the old tires and are in the 40mm range, but I don't know anymore what the range is for each (I didn't keep the ...
0
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1answer
34 views

1996 Mongoose size 19" Crossway 650 replacement size inner tube [duplicate]

My bicycle has a label saying size 19" . What is the tire size for my bicycle and the what is the inner tube size?
4
votes
1answer
150 views

How do self-sealing inner tubes work?

How do self-sealing inner tubes work? I understand it protects against objects up to a certain length, but do I need to still remove the offending object eventually? Or do I need to leave it in? Are ...
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2answers
65 views

What will be the effect of nitrogen if it filled in two wheelers tube? [duplicate]

What if I fill liquid nitrogen in tube of two wheeler?? Is it OK?
0
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2answers
130 views

Why is the tube too long? [duplicate]

My current tube was badly pierced by a screw in the street, so I wanted to replace it with a new one. The tire is a Continental 32 - 622 (28 x 15/8 x 1 1/4 - 700 x 32c), so I bought a 28" tube, ...
1
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2answers
1k views

inner tube to fit in a 26 X 1.5 bicycle tire

I have a tire 26 X 1.5 what size tube should I buy for it? As yet I have not tried tubes because I don't know what size to buy.
0
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2answers
128 views

Relatively new tube exploded by itself without any external force

This morning I heard the tube in the rear tire explode (I never heard a tube explode before. It was quite loud). I hope someone can shed some light on why this may have happened (and how to prevent ...
0
votes
0answers
65 views

Bumpy ride. Is it the casing or the inner tube?

I pumped a new tube to about 80 psi (I missed that on the casing the recommended pressure is 100 psi). On the ride immediatly, I hit a very small kerb harder than I wished and after I noticed that my ...
1
vote
2answers
130 views

Tube puncture over spoke, but rim tape fine

I have a puncture in my tube on a bump in the tube that coincides with a dip in the spoke hole, and am not sure if I need to replace the rim tape or not. I have seen numerous posts about spoke ...
2
votes
1answer
206 views

How to find correct size inner tube

My tyre says 700x38 on the side of it. what size inner tube would I need for the wheel? I've ordered a 700x35 inner tube but it seems a little too big for it?
0
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2answers
82 views

Inner tube popped on back side of the valve - why?

One hour after my first 20-minute ride with new inner tube it exploded with "ps-BAH!" sound. Also, as you can see on the photo, two bulges appeared near the hole. The tire (25mm) allows up to 8 bar ...
10
votes
1answer
912 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?
0
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3answers
425 views

What do I do if my bike won't pump with an air pump at all?

My bike tires will not pump up at all. I tried forever. I had this bike for a year and then it won't pump at all. I have a pump you stand on and use your 2 hands to pump. At first it was pumping air a ...
2
votes
2answers
283 views

How to guesstimate correct tire pressure in the winter?

I ride a rather generic Merida hardtail mountainbike throughout the year. I don't own a pump with a gauge so I usually pump my tires at gas stations (that have automatic pumps with gauges). The ...
2
votes
3answers
474 views

I keep breaking the tips off my presta tube stems

I can't pinpoint what I'm doing wrong while inflating my tubes. I use presta valves and have a "Joe Blow" Topeak pump. I put the tube stem at 12 o'clock, I unscrew the tip of the tube stem (but not ...
1
vote
1answer
234 views

How much can a 700x23 inner tube stretch?

I recycled my dad's road bike (about 20 years left in storage) so I bought a complete set of new wheels. "Good" hubs and rims, not quality brand though but I've been told they're good and that's what ...
1
vote
2answers
1k views

What kind of tires I can use with tubeless rims?

I bought a Trek FX 7.4 last summer, and now, as the conditions are getting more and more slippery, I'm thinking of getting a bit more winter-y tires. The rims are tubeless, but I'm a bit confused of ...
1
vote
3answers
338 views

Help! Tire Pressure

I have a sorta light weight 54cm fixed gear (18 pounds) and I weigh about 115 pounds. I have a set of continental ultra tires for my 622/14mm (700x23) bianchi rims with standard 20-25 tubes. The thing ...
3
votes
5answers
575 views

Do good tires lessen the chances of your innertube bursting?

I have only bought my bike for a month and a half and within this time span, my innertube actually burst 4 times. The bike itself is relatively cheap so I doubt that the tires are of good quality. I ...
4
votes
2answers
223 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 ...
3
votes
2answers
1k 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. Tube Glue which kind of a pain in the ass ...
1
vote
1answer
518 views

Will an innertube for 700x35c-44c be ok for a bike that says it needs size 700x45c?

I need to replace my innertube and took a photo of the tyre mark to show the guy in the bike shop for the size. It says 700 x 45c. I bought the innertube he gave me based on this and only checked the ...
2
votes
1answer
591 views

Homemade Tubeless Tires

As I was browsing Youtube for cycling related videos, this one on making your own tubeless setup caught my eye. The procedure is essentially as follows: Clean a standard rim (not for tubeless ...
2
votes
5answers
110 views

How can I tell if I have properly patched a tube? (specifically a 2" mt. bike tube)

I normally swap out a the tube on the trail if I get a flat and then patch at home. So that leaves me with a patched tube ready to put in a tire and I'd like to test it without having to swap out a ...
3
votes
4answers
3k 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 ...
4
votes
2answers
747 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 ...
1
vote
2answers
158 views

Why has my ride changed?

The bike is a Specialized Camber 29, about five months old, from a shop about 220km away. Something feels different in my ride, and I'm wondering what it is. the rear goes sideways in sand much ...
1
vote
2answers
157 views

The tire got flat the third day of changing it

I'm new to bikes. I got a used bike that had all the tires and tubes broken so I had to change them all. I changed the tires and the tubes completely two days ago, then I went cycling the next days. ...
0
votes
1answer
360 views

Tire's won't inflate after winter

A few weeks ago I tried to take my Trek road bike for my first ride since last fall. It has been sitting in my (uninsulated) garage over throughout the winter and when I tried to inflate my tires the ...
1
vote
2answers
500 views

What is a cheap puncture-proof tire against tackweed?

Lately, each time I ride my bike around the Bay Area, I get tackweed onto my wheels where upon one or both of them flatten overnight. Most of those are five minute rides to my local library. So, I ...
2
votes
2answers
591 views

Can I approximate how much air pressure is lost from disconnecting the hose?

I have a floor pump intended for mainly rather low pressure tires. It lets out quite a bit of air from the hose when disconnected. Can I calculate (approximately) how much air pressure is lost by ...
3
votes
1answer
3k 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 ...
1
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3answers
200 views

Do I have too much chafer strip showing after fixing a puncture?

I have had two innertubes explode on me on my bicycle, on the same wheel and tire. The first time I was inflating my inner tube after aquiring a puncture. On this occassion I was pumping my tires ...
3
votes
1answer
363 views

installing a 700-18-23C tube on a bicycle

When installing a 700-18/23C tube, does the nut on the valve stem go inside the tire (unseen once the tire is on the wheel rim) or outside the rim (so it is seen among the spokes)?
1
vote
3answers
1k views

Cycle tyre and tube burst

I pumped my cycle front tyre to 105 psi (700*23c) 5 days back and cycled some 60 km on the same day without any punctures. Afterwards I parked the cycle in my bedroom for the last 5 days (due to ...
2
votes
1answer
521 views

What size of slick tire should I buy?

I purchased a mountain bike and I ride on the road most of the time and I was looking at slicks for my bike. My tire size that I have now is 26x2.00 and the rims. I have on are AT-550 26inch what size ...