35
votes
Accepted
Time for a new tyre?
Normally safe is relative, in this case, its absolute - no, it is not safe. Don't ride on that tire. I would - but only to get home, and I would be feeling for any sign of further degradation (...
- 52.3k
19
votes
The tire of my bicycle flattens within a week
Not an uncommon kind of puncture. A very small hole in the tube can take weeks before the tire becomes flat. It can also be caused by a leaking valve.
Use soapy water to wet the valve and look for a ...
- 52.3k
19
votes
Accepted
Is rolling resistance that significant?
Yes - rolling resistance is significant. It is less important than aerodynamics, but is next in line.
A harder tyre deforms less, and if everything else is unchanged, a lower pressure tyre is slower ...
- 129k
17
votes
Are wider tires on a road bike a good idea?
For long days in the saddle, on rough paved roads, 32-35mm tyres provide a significant comfort benefit over the likes of 25mm, when run at an appropriate pressure. Riding in the dark also benefits ...
- 61.2k
16
votes
Why would solid rubber tubes be no good to some?
In short: High rolling resistance, high mass, bad comfort.
Even virtually puncture proof pneumatic tyres with very thick rubber layers like the Schwalbe Marathon Plus perform better in those aspects.
...
- 28.8k
14
votes
Accepted
Is bike tyre pressure info deliberately hard to read?
No, it is not intentionally hard to read. It is just shaped in the mould from the rubber material, but on reasonably new tyres, it is not that hard to read. The manufacturer's logo is a sort of ...
- 16.7k
12
votes
Time for a new tyre?
No, this would probably not be "safe" to ride on. That "white stuff" looks like the casing threads(the T in TPI when you buy tires) that gives the tire its structural strength. You ...
- 2,262
12
votes
Accepted
Can I put 28" tires on 27,5" wheel?
The bead/rim diameter difference between the two sizes is 38mm (622mm - 584mm) or 1 1/2in. So no, there is no way to even fit a 28" tire on a 27.5" rim, as the bead diameter of a 28" ...
- 22.8k
11
votes
Old tire blew out of the rim
Is it normal for a bead to rip out of an old tire?
Yes
When a tire reaches the age where the cloth core of the tie has dry rotted then it is normal for the bead to tear rip out even under normal tire ...
- 22.9k
11
votes
Is bike tyre pressure info deliberately hard to read?
The pressures listed on bike tires are only the maximum and/or minimum pressure, not the optimal pressure. Optimal pressure is dependent on tire width, rider weight, front-to-back weight distribution,...
- 641
11
votes
Are foldable tires less puncture resistant?
The two characteristics are not directly linked, as they involve two different parts of the tire structure:
puncture resistance is influenced by the casing of the tire, and the reinforcement that are ...
- 22.8k
9
votes
Old tire blew out of the rim
Maximum pressure in a rotten MTB tire at 4.5 bar. Why would it not go wrong? Pressure gauges are sometimes not perfectly accurate, so perhaps you went above the max pressure in reality? Max pressure ...
- 2,262
9
votes
Time for a new tyre?
I know from personal experience that a tyre like that fairly rapidly leads to a tyre that lets the inner tube reach the road, and that leads to a no air situation in pretty short order.
Mine went from ...
- 91
9
votes
What are the drawbacks of having wider tires on endurance road bikes, as they may offer the same rolling resistance with lower pressure/more comfort?
Short and simple it’s a combination of aerodynamics, weight and perception/history.
The wider the tyre (and the frame which fits the tyre) the more aerodynamic drag you are going to have. Weight also ...
- 28.8k
9
votes
Is rolling resistance that significant?
How significant is rolling resistance?
It's the second most important continuous resisting force on a bike.
When you ride uphill, depending on the slope of the hill, the most important resistance is ...
- 20.5k
9
votes
Technique for Riding a Hybrid Bike on Trails and Switching to Knobbed Tires?
Using offroad tires will greatly improve the grip in dirt. Even with just 35mm clearance there is a great selection of appropriate tires in the gravel and cyclocross segment of the big tire ...
- 2,683
9
votes
Accepted
Small debris which has punctured a tubeless tire: to leave or to remove?
You should remove them, I can think of two main reasons:
sharp debris like glass can cause additional damage if not removed, so should definitely be removed.
you have much less guarantee that the ...
- 22.8k
8
votes
Accepted
Does low tire pressure affect safe, minimum tire clearance?
By "clearance" I assume you mean distance between the tire and frame members.
If you run a tire at low pressure, that only affects the tire's shape where it contacts the ground. It won't ...
- 30.4k
8
votes
Accepted
I put a 700 x 35c inner tube in my 700 x 38c tyre. Is my tyre in risk for a flat?
Any increase in puncture risk from a fitting a 38mm tyre with a tube rated for 35mm (max) is tiny. Don't worry about it.
The softness you're feeling is probably simply that you haven't pumped it up ...
- 61.2k
8
votes
When I press down on my presta valve cap when it is open why is no air coming out
Did you unthread the small acorn nut at the top of the presta valve?
It should turn about 4 turns and once loose, you can press the top down and air should come out.
If you don't open this nut, air ...
- 129k
8
votes
Are wider tires on a road bike a good idea?
Yes, it's extremely practical.
There are in general two reasons to favor wide tires at lower pressures.
One is riding on soft sand roads. On such roads, a narrow high pressure tire can squirm a bit, ...
- 20.5k
8
votes
Road Tyre on Gravel Bike Compaitability
I have 2 very similar wheelsets for my gravel bike, one with road tyres (32mm Schwalbe Marathon Supreme / Schwalbe One Plus) and one with the same Riddlers you've got.
I also have plenty of experience ...
- 61.2k
7
votes
"Hooked rims only" tire on hookless rim?
There is a muddle of history and context here.
For decades, before the rise of hookless tubeless-compatible (often carbon) rims, many tire sidewalls of all sizes and genres said "hooked rim only&...
- 87k
7
votes
Is rolling resistance that significant?
If we go by https://www.bicyclerollingresistance.com there is about 10W of difference between the fastest and slowest touring tyres (they measure at 28km/h with a 45kg load and 5.2bar of tyre pressure ...
- 28.8k
7
votes
Is bike tyre pressure info deliberately hard to read?
The tire specifications, including recommended pressure, is usually (I've never seen an exception) molded in the tire, not written/added on later. This makes it a bit harder to read, but the specs ...
- 2,262
6
votes
Panaracer Gravelking SK Tubeless Blowout on WTB i21
Recently, an understandably irate user posted a YouTube video of a Continental GP 5000 tire blow out on an Extralite wheel when installed according to manufacturer instructions. The user contacted ...
- 35.2k
6
votes
Changing tyre on Diamondback mtb 29"
Wait a moment - this line is concerning:
I usually experience the inner tube coming out especially when I pump in air and ride it the tube comes out.
That sounds like your rim and tyre are not ...
- 129k
6
votes
Accepted
What are the drawbacks of having wider tires on endurance road bikes, as they may offer the same rolling resistance with lower pressure/more comfort?
There's no substantive disadvantage in many situations.
Each wheel can accommodate a range of tire sizes to achieve good aerodynamic drag figures. If you run tires too big, this will disrupt the ...
- 35.2k
6
votes
valve stem caps on tubeless tires
I'm not opening up the caps vs. no caps discussion but I think the main purpose is to protect the valves from dirt/contamination and damage rather than sealing it. I never tried but I'm pretty certain ...
- 4,556
6
votes
Accepted
List of most common types of bicycle tyre flats (tube tire flat puncture)
Blowout is where the tyre failed at holding pressure, and the tube was left unsupported. These holes are often missing small parts of tube, and could have radial tears going outwards. Often sudden, ...
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