Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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

5
votes
5answers
266 views

Why do my tires always deflate between rides?

I realize this is a topic that’s been posted about a few times, but please forgive me for adding a new thread anyway just to make sure I’m not missing something. I don’t know much at all about bicycle ...
7
votes
4answers
184 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 ...
0
votes
1answer
74 views

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

This is on the outside of the tube. There is a series of small dots marks about 1-2mm apart, and one of them has turned into a puncture. I've felt around the inside of the wheel, and the inside of ...
2
votes
2answers
122 views

Bontrager thorn-resistant vs self-sealing tubes?

So I arrived in New Mexico a bit over a month ago from the East Coast. Little did I know, there are things called "goatheads" that will give you flats like crazy. So I found that out fast on my 29er. ...
7
votes
3answers
147 views

Inner tubes - if two tubes match the tire, is bigger or smaller better for durability?

Some of the inner tubes tire thickness ranges overlap. For example Schwalbe often offers tubes in 1.5"-2.4" and 2.1"-3.0" width ranges. Given a tire that fits both ranges, like for example a 2.15" ...
7
votes
2answers
600 views

Tube patches: dedicated ones or recycling old tubes?

Before I discovered puncture less tires, I had often to patch my inner tubes. I initially bought dedicated patches (which invariantly were too big or too stiff), then decided to try cutting old tubes ...
14
votes
8answers
379 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 ...
1
vote
2answers
654 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 ...
1
vote
1answer
487 views

Which inner tube do I need to buy for 28 inch fixie bike?

I have a 2018 FIXIE Inc. Betty Leeds. https://www.fahrrad.de/fixie-inc-betty-leeds-white-694674.html These are the sizes of the tyres: Reifen vorne Marke: Kenda Typ: K-193 Größe: 28 Zoll ...
5
votes
3answers
1k 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. ...
3
votes
3answers
520 views

Why did both of my inner tubes blow out on a new bike I've only put 4 hours on?

I bought a new Diamondback Trace hybrid bike about a month ago. Rode it twice for about an hour a piece and the last time for about two hours. I had no problems any of the times and inflated the tires ...
0
votes
1answer
142 views

Inner tube size

I'm really confused what inner tube size I need to buy for the tyres I have. Is anyone able to help me understand what is written on the tyre and what to look for? 40/100-622 33b moped m/c
2
votes
2answers
77 views

Diameter of valve hole in the inner wall of the rim

Let's say I have presta valve, so the outer hole in the rim is 6 mm (the visible hole). However rim can have inner "wall" inside with inner hole in it -- to my surprise the hole has bigger diameter. ...
2
votes
1answer
215 views

Can I use rimless tape with an inner tube on a regular (tube style) rim?

The plastic and cloth rim tapes at my LBS come in a couple of sizes: too narrow and too wide. Too narrow barely covers the spoke holes (meaning, it doesn't). Too wide gets into the bead area, making ...
2
votes
2answers
205 views

Inner tube valve cut from stretched rim tape?

I was trying to fix my sisters flat tire to make some money by charging her fees cheaper than the bike shop. I found the leak to be on the actual valve piece. Near the base there is a small cut ...
3
votes
4answers
166 views

Could a flat tyre two days later be due to a clumsy service?

I had my bike serviced on Monday. Part way through the workshop called to inform me that they thought both tyres were perished and needed replacing. I trusted their judgement and gave them the go ...
0
votes
0answers
27 views

Tire size question [duplicate]

I'll start by saying I am COMPLETELY new to the bicycle world. Just purchased a bike for commuting to work and am planning on giving it a makeover. I need new tires and tubes. My question is - if ...
1
vote
2answers
1k views

Can I fix an inner tube if the valve has been pushed inside?

I can't pump my bike tire because the valve of the inner tube has been pushed inside, where its not visible anymore. Is there a possible way for me to fix this or should I buy a new inner tube?
2
votes
2answers
274 views

Schrader inner tube gets cut by Presta sized hole in rim

I am new at bikes. I got an old bike with flat tires which I decided to put back to life. I went to Walmart and got the cheapest inner tubes (Goodyear) which turned out to be Schrader type. I had no ...
1
vote
1answer
92 views

Choosing the right tube for my tire

I wanted to change my bike tire. Is it okay to use 26x1.90 inner tube with 26x1.95 tire?
1
vote
1answer
269 views

Which size inner tubes to buy?

New to cycling and have no idea what size inner tubes to buy for my particular bike. Following dimensions on tire: N28x1.75*36H 622*19c Seems to me this is an unconventional wheel size? Was ...
5
votes
3answers
385 views

Why do I keep getting cut looking flats?

My flats are causing some deep confusion. In the last year I've replaced at least 12 inner tubes because I keep getting flats. They are not puncture or pinch flats, they look like cuts to the tube, ...
5
votes
3answers
375 views

Outside of Schrader valve is inflating. This isn’t right, is it?

My wife has an old Moulton bike. I was inflating her tyres (small wheels, tyre imprinted ‘50 pounds’, when the rubber surround of the Schrader valve started inflating also. It all seems quite ...
5
votes
3answers
667 views

I keep getting flats right at the valve!

I changed 3 inner-tubes, they keep getting cut right at the bottom of the valve. I sanded down the hole where the valve goes, it had a sharp edge! Flats still happening...
8
votes
1answer
314 views

How do I patch a tube's ribbed area?

Normally, when applying a patch to a tube, both the patch and the tube surfaces are smooth and it is easy to press the patch onto the tube. However, some tubes have small ribbed areas where it is ...
2
votes
1answer
145 views

Tire and Tube size mismatch

I have a tire with 24x2.125 written on it, and the new inner tube which I'm planning to install 24x2.175-3.0 Is this too big for the tire and can be prone to punctures etc. or should be OK? It is a ...
1
vote
3answers
562 views

4 punctures in one week, even after replacing tube and tire, what's happening?

I've just had my 4th puncture in 8 days on the bike I use to commute to work. Same back wheel each time. I haven't had a puncture before in the 2 years I've had this bike. After the first puncture I ...
-2
votes
2answers
279 views

I just bought a new Cube Hyde Bike [closed]

I just bought a new cube hyde 2017 bike and I'm not the biggest fan of the stock tyres that came with the bike. I mainly use it on roads and urban areas so I would prefer a more low profile tyre. Any ...
4
votes
1answer
268 views

Does an old tire become tight?

I'm asking this question (see the title) because I wasted so much time/energy (after having a punctured tube) trying to remove the tire and to put it again, while the guys I see on Youtube don't seem ...
5
votes
1answer
268 views

Sidewall repeatedly splitting in same place on rim

Good afternoon, folks. Wondering if anyone has had this or a similar issue: I blew a tire a few weeks back and replaced the tube and tire after thoroughly inspecting the rim for damage. After a few ...
3
votes
1answer
477 views

Tube compatibility for given tyre dimensions

My tire says: 700x40c 40-622 , is the tube in the picture a perfect fit?
3
votes
1answer
361 views

Can't get tire to seat right when changing tube

I can't change tires for the life of me and I'm not sure what I'm doing wrong. I go through the standard procedure: Slightly inflate the tube Put the tire halfway on the rim Stuff the tube into the ...
2
votes
2answers
260 views

Presta valve inner tube issue: area around the valve does not fill up

I have this problem I keep running into and it's getting pretty expensive. I've bought many inner tubes and when I pump the tire up with air, the inner tube fills up really good except in the area ...
3
votes
1answer
195 views

How do I prevent a tube valve from fusing to my rim

I have a 20" Sun Rims CR-18 rear rim. This rim has a cylindrical metal sleeve that goes through the valve hole. Not sure where that came from, as I inherited the rim with the bike when I bought it ...
4
votes
1answer
564 views

What's the smallest possible tube that will work with my bikes?

I've seen questions concerning tube size but I haven't found anything matching what I'm trying to accomplish. I want to buy a few tubes to keep around for trails-side emergencies when mountain biking....
5
votes
1answer
241 views

How does Slime coagulate and seal holes in tires?

How do tire tube sealants like Slime coagulate and seal holes? They can't coagulate like blood, because there's air already in the tube and they'd solidify. It also can't be in contact with moisture ...
5
votes
1answer
863 views

How often should we add inner tube sealant liquid?

When I recently bought my new MTB: CUBE ACID 29" 2017, the shop put sealant liquid in the inner tubes. So far so good, great, no punctures, no loss of air, really happy. My questions: How often (or ...
-1
votes
1answer
99 views

Strange tube leak [duplicate]

So I have this bmx bike where the back tire's inner tube was leaking air and I'd have to inflate it every day or so. And I just got a new tube and it's having the same issue. Anyone got any ideas?
5
votes
1answer
354 views

Misshapen inner tube, is this evidence of it being incorrectly fitted?

I recently fitted new tires and inner tubes (Continental 700 25c). Today I had a fairly slow puncture, going flat in around 20 mins. I removed the tube and found that the puncture was at the edge of ...
2
votes
1answer
135 views

Choice of spare tyre and tube in Europe for 40-559(ETRTO) or 26"X1.5

I am currently having tyre 40-559(ETRTO) or 26"X1.5 and tube picture. But I recently thought of buying a spare tube and tyre(available on some offer). However, I had a hard time in matching it with my ...
2
votes
1answer
207 views

Difference between 22x635 and 40x635 wheels/inner tubes?

Today I had my first encounter with the wildly variegated world of inner tubes / tires / wheels sizes. My wheel shows this, no info readable on the tire: I already discovered that 28x1.5 and 28x1 1/2 ...
0
votes
1answer
407 views

Picking an inner tube size [duplicate]

So I need to replace my inner tube as it got destroyed beyond any repair I can make (a hole right under the valve) but unfortunately I dont know what size the inner tube should be and I cannot figure ...
4
votes
2answers
3k views

Can I keep using my outer tube tyre with a hole in it

I was riding down a nice smooth bike path the other day (at speed), and there was a branch full of thorns about 10m ahead of me, straddling the path. I couldn't have gone around it. One of the thorns ...
9
votes
1answer
1k views

Presta Valve Keeps Ripping From Tube

I'm an amateur biker, but regularly bike to work. I've been having a problem with my tubes going flat when the valve tears away from the tube. Here's a (grainy) picture to demonstrate: This is ...
0
votes
0answers
53 views

Remove visible thorns etc from tyres equipped with inner tubes with sealant liquid?

Running with inner tubes equipped with sealant liquid, should we remove visible thorns etc or not?
2
votes
1answer
842 views

Can I use tubeless tires on Araya DM-27.5 Black 32 hole Rims?

Rookie question, apologies in advance. I have a Saracen Mantra hardtail with Araya DM-27.5 Black 32 hole Rims. I currently have Schwalbe Rapid Rob tires on both front and back. The tires are very bad ...
4
votes
3answers
724 views

Replace or patch inner tubing?

I'm 16 this year and I commute to school on a regular basis on a second-hand Urata Avanteguarde (about 2-3 years old.) I kept getting flats on my rear tire, but by the time I has isolated the problem ...
3
votes
2answers
432 views

silicon spray to treat porous inner tube?

A friend of mine claims that porous (very slowly deflating) tires with inner tubes can be treated by the following procedure: Let the air out. Elevate the bike so the tire is of the floor (no ...
23
votes
11answers
3k 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 ...
1
vote
3answers
4k views

Uneven inner tube when inflated inside the tyre

I have bought a new inner tube that, when I inflate it inside the tyre, it stands out in the part of the valve. In the beginning I didn't realize but riding the bike it felt OK with a small bump ...