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

learn more… | top users | synonyms (2)

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1answer
19 views

What Innertube is needed for my Schwinn Men's Volare 1200 Bike, 700c, Grey

I thought I purchased the right size. Two times I have gotten this wrong. Can any body point me in the right direction? i was hoping to find some on Amazon. And it is so confusing... https://www....
2
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1answer
28 views

How do I work out tube and rim strip size [duplicate]

I have a Schwinn Men's Volare 1200 Bike, 700c. Recently had a flat. I am confused. What size tubes do I need to buy? And also the rim strip snapped. What size rim strip should I order
0
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1answer
49 views

Whats the trick with the thump? [on hold]

I have repeatedly pushed the valve stem back into the stem and try after try am failing at thumping the valve stem out to where I can grab it. I have pushed it through with a piece of bailing wire; ...
2
votes
2answers
94 views

A pin punctured my tyre. Should I only replace the inner tube, or patch the outer, rubber tyre?

Today I managed to run over a flat heat board pin, and my tyre got punctured. I will change my inner tube tomorrow, because it's not that expensive and I find it easier than patching it up. My ...
2
votes
3answers
78 views

Front wheel tube slowly leaks air

After I changed tires to conti 4 seasons in my road bike, the front wheel has been leaking air very slowly. I've changed tubes some 3 times already, and it keeps happening (after a couple of weeks). ...
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2answers
126 views

Should I change the tire and tube or can it be patched?

Someone deliberately pierced the rear tire of my fixed gear bike. It's a 700cX25 tire with 700cX18-23 tube inside. As you can see from the image the threads have come out. I am not sure about the ...
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1answer
88 views

Presta Valves keep failing

New to this site. Hope you can Help. I have been commuting on a hybrid for years. A nice CUBE with hybrid tyres with Scrader valve. The odd puncture here and there. Par for the course. Now I have ...
3
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0answers
41 views

Replace Regina valve with Presta

I have recently bought an Italian bike that uses Regina valves and I need to replace one of the inner tubes. Since I don't live in Italy and can't find that kind of valve anywhere, I thought of using ...
3
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4answers
129 views

stop air leak when disconnecting inflator from presta valve

Presta novice question. When removing the adaptor and quickly screwing the inside core down, air escapes. I've changed from a short Zefal pump to using a compressor. The tire says 50-60 PSI, but by ...
0
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1answer
70 views

How to understand tyre sizes? [duplicate]

I'm a cycling beginner and am trying to purchase spare inner tubes from amazon. The tube sizes are usually given as: 20-622 - 25-630 27x3/4 - 27x1.00 700x20c - 700x25c How should I understand these?...
5
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2answers
206 views

Inner tube blows up due to rim holes

I've decided to cycle to work and got myself a new bike. When the bike arrived I inflated the tyres to 80psi (20 below recommended) using a track pump. Instantly the inner tube blew up. I thought the ...
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2answers
48 views

I have bike tires that read 26 x 1.95. Does that mean I need a 26-inch tube? [duplicate]

I ask because my front tire's inner tube got torn and I needed to replace it. It was 26 x 1.95 as well and I bought a 26 inch bike tube and it was too big -- inflated it would hang 2 inches off the ...
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3answers
120 views

Patched up my tire and still lost air again [duplicate]

I recently popped my tube and I took it out and put a patch on it and made sure that there were no other holes and I didn't find any so I filled it up and rode on it for about an hour, then the next ...
0
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1answer
157 views

Will a “700 x 25-32cc” inner tube fit my “700Cx28/38c” / “ETRTO 622x20” rim? [duplicate]

I have a road bike that has a flat tire, the rim is marked with the text 700Cx28/38c ETRTO 622x20 I am specifically looking at this Continental tube on Amazon. Under the sizing options there is ...
4
votes
2answers
390 views

How tight should your stem valve nut be?

I just got new schrader valve tubes that have the rim fitting nut on them. Since this question has not been asked on here before, what is the proper tension that the nut should meet the rim? My ...
7
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6answers
2k 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 ...
7
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4answers
161 views

How can I tell if a tire contains slime?

I recently had an inner tube on my mountain bike changed, but it was my wife that actually took the bike in to the shop for service. When it came back I noticed the stem has a blue cap rather than ...
8
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2answers
95 views

putting a presta stem nut inside the rim?

Has anyone ever heard of this? I'm not sure how it happened, but when i went to replace my tire today, I found that I had two stem lock nuts on my valve. One inside the rim and one in the normal place....
2
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1answer
37 views

Tube Flat Fold Width

I work in the bicycle industry and have never heard nor needed to know the term Flat Folding Width of a tube. Is this even pertinent information to anything other than maybe how many you can jam in ...
3
votes
2answers
145 views

Can I inflate to 8bar?

I am quite new in the world of urban cycling and I am liking it A LOT. for the sake of curiosity I want my wheels to be as hard as possible, know how this feels and how my bike behaves. As of now, ...
1
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1answer
70 views

Innertube fat on one side, skinny on the other [duplicate]

I just bought a bicycle/bike tube (20"), when i inflate it, 1 side of it goes big/fat and the other just inflates normally, what should i do? , its happened with some of my other tubes.
7
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5answers
369 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, ...
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2answers
299 views

Can Inner tube 1.25 / 1.5 fit 26x1.4 tire?

I have a tire 26 X 1.4 what size tube should I buy for it? 1.25 or 1.5 Inner tube ?
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2answers
2k 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 ...
3
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4answers
374 views

inner tube width range relative to tire width: reliability effects?

[Apologies if this seems like a dup: I see there are lotsa tire+tube questions, but this one does seem to be slightly different, in that it strives for generality and concerns choice between ...
2
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1answer
214 views

Is it 'safe' to use a 700 x 47c tyre on a rim with inner width of 15mm?

Looking to upgrade my tyres on an old roadie mash up to something chunkier so I can handle some off road sections on a ride coming up, currently it has a 27 x 1 1/4 front tyre and a 27 x 1 3/8 rear ...
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2answers
181 views

Future of Tire technology

Why do tire producing companies still produce tubulars? Isn`t Tubeless the technology of the future?
2
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3answers
196 views

Do you know of tubes that are fully flat-proof?

I am looking into whether there are inner tubes that are fully flat proof. Do you know how much they would affect performance and comfort?
5
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2answers
175 views

Is my pump faulty or my tyre?

I have recently bought a Specialized women's road bike and for the last couple of weeks was borrowing my boyfriend's hand pump with no real issues. Last night I finally purchased my own (Topeak ...
5
votes
2answers
324 views

Should I be able to peel off a glued tire patch?

One of the things that I've noticed with the low-cost tube patch kit that I bought is that I'm able to catch an edge of the glued patch with my knife or fingernail and peel the patch off the tube like ...
5
votes
1answer
733 views

Is it ok to use an inner tube that is slightly too large for the tire?

My hybrid bike tire measurement says 700x35c. I ordered a replacement inner tube stating it was 700x35-40c but when it arrived it is actually 700x38-45c. Could I still use this or will it cause a ...
2
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1answer
294 views

Will Stans No-Tubes (or other tubless tire sealant) work in a standard tube to prevent leaks?

I typically buy tubes with removable valve cores (Qtubes brand typically) and I have some stans leftover from a tubeless tire setup for my mountain bike. Would adding Stans to the tubes on my ...
0
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1answer
133 views

flat tyre even after replacing the tube? [duplicate]

So I bought a used Specialized Sirrus 2011 model as my first bike (so I'm new here) recently and I love riding it, light weight, smooth handling and comfy to ride. Rear wheel was flat when I bought it ...
1
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1answer
92 views

Uneven inflation of a new inner tube? [duplicate]

I bought a new inner tube and when I tried to inflate it, the tube got unevenly inflated (check picture). This is the first time I'm installing a tube by myself so I don't know if this is normal. Do ...
0
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0answers
48 views

proper tube size for bicycle tire [duplicate]

My bicycle tire specification is 40-622 (700x38C-28x1 5/8 x 1 1/2), would you please tell me the right size of the proper inner tube?
4
votes
3answers
688 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 ...
6
votes
1answer
161 views

Can I fix a bad tube patch?

So I did a hasty fix this morning when I had a puncture. It got me to where I needed to go, but by the evening it was flat again. I checked under water and there is that tiny little air bubbles ...
3
votes
2answers
171 views

What causes a tube to become deflated on its own?

I recently went to get my bike ready for a ride, and I noticed right away that my rear tire had completely deflated. I took off the wheel, and took out the tube and checked it for puncture but didn't ...
3
votes
4answers
126 views

Unpatchable hole on rim side

Well, I am new to road biking and I got my first flat yesterday. I was going to go for a ride and the front tire was completely flat, so I popped it off and went to patch it. I found the hole, it was ...
5
votes
4answers
685 views

What size innertube for 35mm tires? (or: get innertubes on the big side or small side?)

If you had 35mm tires (Schwalbe marathon supremes to be specific) would you get innertubes speced as 28-35mm or 35-42mm? Or whichever is cheaper?
1
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2answers
69 views

Why does rear tire lose 35 psi in a week with new innertube and tire?

My hybrid bike recently got a piece of glass through my rear tire and innertube. I bought both a new tire and innertube (700x35c schrader). I filled up both tires to 65psi. A week later the front ...
2
votes
1answer
134 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 ...
8
votes
2answers
645 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 ...
1
vote
1answer
90 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 ...
5
votes
2answers
205 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 ...
3
votes
1answer
306 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 ...
7
votes
8answers
678 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 ...
1
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2answers
95 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 ...
4
votes
3answers
124 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 ...
5
votes
1answer
1k 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 ...