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Questions tagged [tire-pressure]

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3
votes
1answer
99 views

How to determine the minimum tire pressure if the manufacturer does not?

Some tires only have the maximum pressure written on them, stating nothing about the minimum. For soft and comfortable rides, the recommendation is to inflate them to lower pressures, but then how to ...
3
votes
1answer
110 views

Pressure range conflict between tire and rim

I just mounted a new Ardnet Race tire that has a side label pressure rating of 35 - 60 psi . The Stans Arch Ex rim that is mounted to says max pressure is 38 lbs, there is a little range on the ...
2
votes
2answers
493 views

Time trial carbon frame scratches. Should I concern?

While cleaning my time trial bike I've noticed many scratches in the frame. See pictures below. My tire pressure is usually around 100 psi, depending on the weather conditions or circuit. My wheels ...
5
votes
3answers
2k views

What pressure should a tire have?

I am a new bike rider. Over three months, my wheels are a little bit flat. However I am not too sure as to what pressure I should pump them back up to. Currently they show 25 PSI (172 kPa). It is a ...
0
votes
2answers
174 views

Tires explode way under rated pressure limit

I'm restoring my dad's old Jeunet racing bike from the seventies. First thing I did was buy two new tires. The old ones looked still OK, but wanted to take no risk with 40 year old rubber. The new ...
4
votes
2answers
622 views

Cracks on tire - still safe to ride?

I just experienced some uncommon cracks on the tires (Schwalbe Durano Plus) The tires are pretty new (less than half year old, and used max. 1500 km). I inflated 6 bars in the tire, and according to ...
3
votes
3answers
629 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 ...
35
votes
3answers
8k views

Why are emergency inflation cartridges filled with CO2?

Why aren't they filled with ambient air using air compressors? Isn't compressing ambient air cheaper than generating CO2? If it is, then those cartridges would have two benefits: Cheaper to ...
2
votes
1answer
669 views

Using compressor gauge to determine tyre pressure?

I own one of these "pistols" used with compressors, but have no idea on how to use them to determine the pressure inside my (tubeless) tyre. When I inflate my tyre the values on the gauge get ...
2
votes
1answer
619 views

Sudden loss of air on tubless tyre, and now it won't inflate

Finding bike answers on the internet is really hard when you have no idea what you're looking for, so I'm sorry if I'm asking a ridiculous question here. Cycling back today I went over a bump in the ...
2
votes
3answers
895 views

What is the maximum tire pressure?

I have a Trek FX3 with Bontrager AW1 Hard-Case Lite, 700x32c and I would like to know what the maximum tire pressure is? The reason I ask is when riding at higher speeds and turning it feels like the ...
0
votes
2answers
201 views

Increasing speed and reducing effort on steel MTB on the road [duplicate]

I have a low end steel MTB, which is heavy by itself, and I also a heavy man weighting in at 100kg, and on my MTB I have knobby dirt tires. As you can imagine, riding on the road any faster than 20km/...
3
votes
1answer
1k views

Are there measurements of road bike tire friction coefficients?

I am trying to learn about the maxium lean angle of a road bike. I'm looking for measurements and comparisons.
4
votes
1answer
148 views

Massive loss of pressure in my front tire but it still holds air

Last night I was riding into a parking garage with a steep decline before the entrance. I hit the bottom of the ramp hard and lost most of the tire pressure in my front tire in a split second. I ...
6
votes
3answers
741 views

Does a fat tire ride softer than a skinny one at the same pressure?

Fat tires are associated with good bump absorption. Is this due to their fatness, or is it due to the low pressure with which they can be used? If I pump a fatbike tire to 120 psi (yes, that would be ...
3
votes
3answers
2k views

how much air loss over time is considered normal / acceptable for a road or hybrid tire?

I'm looking for a rule of thumb as to how much air loss over time is considered acceptable / normal for a road or hybrid tire. Surprisingly I have not been able to find much on this upon Googling. ...
2
votes
4answers
3k views

There is a grinding feeling at the end of my pedaling at high speed

I bought a road bike about 6 weeks ago, but I just only realised it now that at the end of my pedaling (when either foot pushes down), I can feel a bit of a drag/friction/grinding on either pedal. I ...
1
vote
2answers
380 views

Compatibility of pressure gauge with valve

I have a tube with schrader valve, for which I want to buy a pressure gauge. Is there a specific type of nozzle for different types of valves? How many types of such nozzles are available for ...
2
votes
6answers
4k views

Can't get over 50psi in bike wheel

I've just replaced my mountain bike tyres/tubes with new 26x1.50 city slicks. Max psi is 80 but my foot pump won't push more than 50 in. Is this because it's a schrader valve, or do you think my foot ...
3
votes
2answers
351 views

Can I estimate tyre pressures on a road bike?

Can I estimate my road bike tyre pressures by pressing my thumb into the tyre? I don't have a tyre pressure gauge, and feel that the tyres on my new Merida Scultura are pumped too hard.
5
votes
2answers
1k views

Rode on a flat tire - how do I check for possible damage?

Took quite a fall today while riding, big divot in a gravel path right over the peak of a small hill. After replacing the chain and doing a quick inspection, I resumed the 10 mile trip to the car. I ...
1
vote
2answers
104 views

Slow leak that fixed itself?

I noticed that my back tyre was losing pressure -- on the order of 70 psi down to under 30 psi in three days. (I pumped it up and left the bike alone for those three days.) I thought it had a small ...
2
votes
1answer
615 views

Can I under inflate bike tires to reach a 15 percent drop?

The recommended tire pressure is when the tire's height drops by 15% when it's loaded because it makes the ride comfortable without increasing the tire's rolling resistance too much. Less bumpy rides ...
7
votes
2answers
1k views

What to check after blowing tire off rim

Recently, after mis-reading "35-65 PSI" on a tire sidewall as "35-85 PSI" (in retrospect the unusually huge range should have tipped me off), I inflated a tire rated for 65PSI max to 80PSI. A few ...
3
votes
1answer
100 views

Running tires with significantly different pressures?

I ordered a replacement for one of the old Schwalbe Marathon 700x28C tires on my ancient road bike, and it turns out that "new" Marathons of that size are meant to be inflated to 80-110psi despite ...
4
votes
3answers
234 views

How do I know when it's time to pump up my tires?

I've been cycling for several months now. However, I have had the misfortune of having two bicycles stolen from me, so I've never had a single bicycle for more than a few months. With time passing, I'...
12
votes
7answers
13k 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 ...
-1
votes
2answers
1k views

Scared of damaging bike going up and off curbs [duplicate]

Bike: Giant ATX 27.5 2 (2016) - Hardtail My current strategy to going off curbs is nose diving... I know, the best. My current strategy to going up curbs is barely lifting my front wheel onto the ...
4
votes
1answer
2k views

How does my tire pressure effect the tire's maximum load?

So, I've very recently bought a brand new "Radius Targa"... The pressure I'm told to inflate my tires to (which it says on the side of the wheel) is 50 PSI, the only measurements I can find on the ...
3
votes
1answer
442 views

Is contact patch area governed by A=W/P

contact_patch_area = weight / tire_pressure Is this true? Wikipedia says "mostly". This guy analyzed some automobile tire manufacturer, and although the info was self-conflicting, he concludes ...
3
votes
2answers
676 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, ...
0
votes
3answers
597 views

Tire pressure on new bike

I have the new Tommaso (was Timmaso) Imola bike with Tommaso Corsa TC20 wheels. The tire sidewall says "max pressure 90 psi" The tire is the kenda 700x25c. I am 5'9" 220 used to be a power-lifter ...
1
vote
1answer
382 views

Tyre loosing air pressure despite having no puncture [duplicate]

The front tyre on my bike looses air pressure despite there being no punctures. There is no leak via the Schrader valve either. If I fill up the tyre, it looses a considerable amount of pressure by ...
0
votes
2answers
547 views

Tire pressure decrease when the bike is idle [duplicate]

I ride a Btwin MyBike 7s. Yesterday morning I noticed (for the first time since purchase) that in my rear tire, the tire pressure has decreased to a flat. I thought it was a puncture, so I refilled ...
5
votes
5answers
1k views

Why do skinny tires require less pedal effort?

Everyone knows (citation needed) that (at fixed rim diameter) tyres with smaller section require less effort to move around (at least on a paved road). TL; DR. Why? A bit of context. I always ...
0
votes
2answers
1k views

What is the correct inflation pressure for hybrid road/city bike? [duplicate]

I have a road bike and I got a flat tire probably after going back on the road from the sidewalk very carefully. I guess I pinched my tire. I usually inflate my tires to 7 bars. Is it enough and can ...
12
votes
6answers
5k views

How seriously should I take the maximum pressure rating of my cyclocross rims?

I own a very nice cyclocross bike that I use for daily commuting. It is currently fitted with relatively wide cyclocross tires (Continental Cyclocross Race 35-622) that I inflate to 4 bar (58 psi). ...
3
votes
3answers
180 views

What is the significance of tire minimum pressure?

Its quite intuitive that tires have maximum pressure figure - inflate it more and something could explode. Furthermore, it is common knowledge that under-inflated tires result in snake bites. What ...
4
votes
1answer
2k views

Inflated tire partially slipped off rim, can I fix without deflating?

There is a ~3" portion of my back tire that is no longer within the rim walls on one side. It's an older bike but in fairly good condition. The tires had just been replaced by a professional and I put ...
4
votes
3answers
1k views

What pressure should I run? Front versus the back wheel?

I assume it is common sense you should run a lower pressure in the front wheel versus the back. I weigh 175 lbs (79kg), I have tires with max 120 PSI (8.3 bar), what PSI should I run in the front and ...
5
votes
2answers
2k views

Does high PSI or low PSI affect the life of a tire?

Is there a method to tell the life of a tire? How can you tell if a tire is going to wear down faster than another tire? I assume puncture resistant tires wear out slowly, but I'm really curious ...
3
votes
1answer
259 views

Is pressure of presta valve hard to read by design?

I have dual system floor pump. When I use it with auto valve it is no brainer to use -- after attaching the pump I get the reading right away, I pump, with each stroke there is small spike in reading, ...
3
votes
2answers
503 views

Lower tire pressure on wider rims?

For a given tire width, can you safely run a lower pressure on wider rims? Background: My road bike can only fit up to 23 mm tires due to frame clearance, however my rims are a relatively wide 23 mm....
3
votes
5answers
1k views

Minimum tire pressure for 20 mph (32 kph) turn

I almost wiped out on the morning commute while rounding a corner! I have 700x25mm tires and usually keep them around 90psi. What is the most you've put in your tires (psi) to insure flawless turns?
0
votes
1answer
375 views

Rim compression after tire inflation

I trued my wheel yesterday a bit, since many spokes lost some tension. Once I finished, all spokes were quite rigid. Then I put the new tire on and as I was inflating it, I heard the spokes loosen up,...
1
vote
2answers
396 views

How much pressure can mountain bike tires take?

I am thinking of buying a new mountain bike, but I'm unfamiliar with mountain bikes. That's why I need to be well aware of the pressure a mountain bike can handle. How much pressure can mountain bike ...
0
votes
0answers
257 views

Recommended Tire pressure [duplicate]

Looking for recommend. Tire pressure for a 26in MTN bike. Im around 185lbs. I am fixing my bike up, and I want to make sure not to over inflate as I do not want to blow a tire.
1
vote
2answers
1k 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 it)...
5
votes
1answer
3k views

What kind of portable pump should I carry when riding on a fat bike?

However, I just got a fat bike with 4.5in tires. I know that my portable hand pump takes a long time to pump mountain bike tires due to it being optimized for high pressure / low volume. What type of ...
1
vote
2answers
662 views

3 flats in 650 miles (1030 km) on hybrid bike. Tire pressure wrong?

I have a Giant hybrid (with 700x32c 65 PSI tires), stock tires, that I mainly ride on nice roads to and from work ~3.5 km/2.2 miles each way. I weigh 230 lbs/104 kg up from 200 lbs when I bought the ...