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51 votes

Why do bike tires suffer from frequent punctures whereas car tires don't?

The main reason is that bicycle tyres are much, much thinner than car tyres. A little tetrahedron of broken glass or a drawing pin that would puncture both tyre and tube on a bicycle won't trouble a ...
Daniele Procida's user avatar
38 votes

Why do bike tires suffer from frequent punctures whereas car tires don't?

An unaddressed reason is speed-induced wind and the shape of modern roads. Motor vehicles travel in a lane, and a roadway is generally two or more lanes in opposite directions. As such, these two ...
Criggie's user avatar
  • 125k
22 votes
Accepted

How to find punctures in inner tubes?

Do whatever works, really. The problem with the container of water approach is that it requires a container of water. It won't damage the tube. Also, if you need to patch the tube, you have to wait ...
Batman's user avatar
  • 46.2k
20 votes

Frequent punctures, is my weight the problem?

Increased load (i.e rider weight) on a pneumatic tire does not increase the pressure in the tire. The contact patch on the ground just increases in size until the contact patch area x pressure = load (...
Argenti Apparatus's user avatar
20 votes

Unable to get a tube replacement to last

There is a mark in the middle of the valve stem as if something has pressed against it: Given that it was a fresh new tube, it likely means that it had been installed with the valve protruding at a ...
Grigory Rechistov's user avatar
20 votes

Unable to get a tube replacement to last

Check that the rim tape (tape or liner that sits in rim bed) is not loose or spinning. I had an identical issue where a brand new tube would be ruined after a 10 minute ride. The rim tape spins on ...
Warren Burton's user avatar
20 votes
Accepted

Are pre-glued patch kits advisable?

Personally I don't bother patching on the roadside - my success rate was low. Instead I carry a spare tube (sometimes 2) and just swap the whole thing as a primary fix. Then I patch the tube at home ...
Criggie's user avatar
  • 125k
20 votes
Accepted

Can you buy tyres to resist punctures from large thorns?

The Schwalbe Land Cruiser (without Plus) only has a “K Guard” puncture protection. According to Schwalbe it’s one of their weakest puncture protection technologies: https://www.schwalbe.com/en/...
Michael's user avatar
  • 27.8k
18 votes
Accepted

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

You have to remove the wheel to replace the tube. A repair can be done in the frame. On older bikes without quick release, and with current gear hubs, electric hubs, Nuvinci hubs, belts etc, you need ...
Henry Crun's user avatar
  • 1,068
17 votes

How to find punctures in inner tubes?

To follow up on what Batman says, what you use to find the leak depends a lot on the circumstances. If you get a flat by the side of the road (and you don't have a spare tube) then you obviously can'...
Daniel R Hicks's user avatar
17 votes

Recurring flats on new bike

I see three possibilities: Your tire pressure is too low and you are getting pinch flats. As a reference point, with 25mm wide tires and your 74kg weight I’d use at least 6bars (600 kPa) of pressure, ...
Michael's user avatar
  • 27.8k
17 votes

How can I patch a hole on the underside of an inner tube?

It does not matter on which side the hole is, the process is exactly the same anywhere on the tube. Be sure to let the glue become more viscous and sticky by waiting for a while before applying the ...
Vladimir F Героям слава's user avatar
16 votes
Accepted

Technique for self-adhesive puncture repair patches

This kind of failure is basically the reason sticker-type patches have a reputation for not being reliable. Scrupulously sanding the area and getting it as clean as possible (ie, with alcohol or ...
Nathan Knutson's user avatar
16 votes
Accepted

What's the cause of this kind of tyre damage?

Another possible cause is misadjusted rim brakes where the brake pad makes contact with the tire's sidewall.
Andrew Henle's user avatar
  • 10.6k
16 votes

Why did my road bike tire patch fail?

Bike shops don't patch tyres because at $60-100 per hour its not worth their time compared to a new tube. Road tubes can absolutely be patched, however its harder with thicker patches - try and get ...
Criggie's user avatar
  • 125k
14 votes

How can I avoid tearing the valve loose from an inner tube with a wheel lock?

A bike I sometimes borrow has one of these locks, and I can't say it's ever been a problem. You've given the answer in your question: Do not close the wheel lock between a spoke and the valve. If you'...
Chris H's user avatar
  • 59.7k
13 votes

Why does the glue in a puncture repair kit dry up so quickly?

The problem appears to be when air gets into the tube of glue - if air is present in the tube, evaporation will take place. This air can enter the tube during patching, or from a poor seal between the ...
Simon MᶜKenzie's user avatar
13 votes

When does a Marathon Plus tire (not) need replacing?

If this helps at all, I used a set of Marathon Plus tires on a cross-Canada tour last year (8200km), plus a bunch of commuting, totaling about 11,000km. I did not get any flats at any point, but by ...
SSilk's user avatar
  • 4,199
13 votes

Technique for self-adhesive puncture repair patches

I believe pre-glued patches were always intended to be a temporary fix to get you home. When they first came out on the market I remember explicit warnings that these were not a permanent fix. ...
Rider_X's user avatar
  • 30.7k
12 votes

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

I think you answered your own question to a large degree, but probably cost is the big one for most people. Once one knows what they're doing with a traditional vulcanizing patch kit, most of the time ...
Nathan Knutson's user avatar
12 votes
Accepted

Do I need to refill sealant after puncture?

Pull the valve core and poke a 2mm Allen wrench down to test the fluid level with the valve at the 6 o'clock position with the tire off the ground. You want "some" free liquid. How much depends on the ...
Nathan Knutson's user avatar
12 votes

Repeated punctures at the base of the valve stem

The rim hole in the second photo has a clear curve of silver metal. That looks like a sharp burr left over from the drilling process, and it will slowly erode its way into your tube. The solutions ...
Criggie's user avatar
  • 125k
11 votes
Accepted

How To Prevent Holes Around The Inner-tube Valve?

I had a bike shop for 10 years and have 35 years extensive riding and bike innovation experience. This problem had me dumbfounded: six tubes in rapid succession, blown inside the tire, within an hour ...
Art Ludwig's user avatar
11 votes

Why do I keep getting cut looking flats?

Is the cut always the same distance around the tube from the valve? If so then you have something wrong in your rim. Use the punctured tube to measure where the damage is coming from... that will ...
Criggie's user avatar
  • 125k
11 votes

Recurring flats on new bike

there are a few things to check: make sure the rim tape is in good condition (no tears/holes, make sure it's properly aligned in the rim) remove rim tape and check if any spokes protrude more than ...
Maarten -Monica for president's user avatar
11 votes

How to best quick fix worn out tyre

There are several questions here. You were on a road trip and found a hole in your tire... I swapped front and rear tyre to have the weak one in front because it gets less pressure. Was this correct ...
David D's user avatar
  • 21.6k
11 votes

Why do bike tires suffer from frequent punctures whereas car tires don't?

Essentially all modern car tires have steel puncture-protection belts under the tread surface
Armand's user avatar
  • 2,835
11 votes
Accepted

Minimize puncture risk during race. Should I change the tyres?

Those small cuts in the rubber tread are normal and you get them quickly after a few kilometers. I just regularly make sure that no objects are embedded in the tyre since they can dig deeper over time....
Michael's user avatar
  • 27.8k
11 votes

Are solid/tubeless tires worth using in Thorny areas?

Both approaches would help, but are very different. A solid tyre is unpunctureable, but the riding properties are much worse. Not only it is slower, but also the adhesion and the feel over uneven ...
Vladimir F Героям слава's user avatar
11 votes

Why did my bicycle have a spoke shatter and a tube rupture?

Guessing: you had one spoke break at the J bend and the rivet end was lost. The remaining part of spoke popped the tube from below, perhaps it was a little sharp? And the tyre on the outside was ...
Criggie's user avatar
  • 125k

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