59 votes

Why don't people hand pump their tires?

There is no theoretical reason why you couldn't use a bicycle pump to fill car tyres. Indeed I used a double barrel foot pump to pump the tyres on my wifes' bicycle last night that I usually use for ...
user avatar
45 votes
Accepted

Why don't people hand pump their tires?

People do that. Sometimes, at least. I have a high quality (high volume) bike pump at home, and occasionally I use it to check the pressure on the car, or to top off if it's obviously missing ...
user avatar
  • 800
14 votes

Why don't people hand pump their tires?

Huh? I totally do this. I’ve had tires with slow leaks, around 10 psi each month. You’d be surprised how effective a bicycle pump is. 50 pumps is equal to around 5 psi for the tires on my Mazda 3. ...
user avatar
  • 6,499
14 votes
Accepted

When buying a new tire at car shop, they pumped the new tire and it popped loudly, is that normal?

This is absolutely normal. What's going on is they are seating the beads of the tire against the rims. In order to get them to do this, they have to over pressurize the tires a bit, which then allows ...
user avatar
7 votes

Should I over- or under-inflate my tires when towing?

The conflicting advice is confusing to sort out, because the logic seems to have got the cause-and-effect connections wrong. So let's start again... The tires are the only part of the vehicle that is ...
user avatar
  • 2,929
6 votes

Can this be patched?

Expect to be told that damage that severe is not able to be safely repaired. It's not able to be unsafely repaired either. It's time for a replacement tire. Sidewall damage, unless cosmetic, is ...
user avatar
  • 3,592
6 votes
Accepted

What would be so wrong with using ATV preventative tire sealant in a street car?

For the product to provide long-term preventive sealing, it needs to remain in a fluid state. Driving a car on the highway with a tire full of liquid is dangerous. Fix-a-flat style repairs are ...
user avatar
  • 1,536
5 votes
Accepted

2014 Honda Accord: Low Tire Pressure light still on & oil life still showing 40% after recent tire repair & oil change

Oil life indicators try to predict the degradation of the oil using a combination of engine run time, driving distance, number of cold engine starts and similar data. It does not actually check the ...
user avatar
  • 109
4 votes
Accepted

How to know the tire pressure of my car?

Usually in the driver's side door jam there's a sticker which looks something like this: It gives you what the tire pressure should be and load ratings for your vehicle (usually). If it isn't in the ...
user avatar
4 votes

Why don't rubber tires burn due to friction heat when the vehicle is moving

Basically two reasons : the material is designed to support the temperatures in normal use (excessive temperatures can be caused by low pressure and subsequent failure) and the tyre also radiates heat ...
user avatar
  • 34.4k
4 votes
Accepted

Motorcycle Tire Pressure for Rain

This advice/information comparing car and bicycle tires and their tendency to hydroplane by Sheldon Brown maybe helpful. My takeaway from reading this is: If you have a "car like" tire with a wide ...
user avatar
  • 14.3k
4 votes

Uneven readings for tire pressure

Well, there's a few things going on here: your tire pressure monitoring system is saying the pressures are OK (first line at the top) the units for these numbers are kiloPascals (kPa, right next to ...
user avatar
  • 12.1k
4 votes

Should I over- or under-inflate my tires when towing?

I think the terms you're using - over-inflate and under-inflate - aren't the best descriptors. There's a maximum tire pressure, around 50 psi for many tires. Inflating past that PSI would be over-...
user avatar
4 votes

Can this be patched?

If a shop says we can fix it - leave - that damage has affected the plies used in the construction of the sidewall and it will fail even if they can get it to hold air. I had a sharp stone do this to ...
user avatar
  • 34.4k
4 votes

Why don't people hand pump their tires?

Yes you can, but as several answers here point out, the difference in volume between a bike and car tire make it less practical. If you have changed a tire on a bike you know it has an inner tube ...
user avatar
4 votes

Should I be pumping air to a higher pressure when the weather is hot?

Vehicle manufacturers quote recommended pressures with the tire cold (meaning: not immediately after driving) and at "typical" atmospheric conditions. Essentially, they're quoting the pressure at room ...
user avatar
  • 1,124
4 votes
Accepted

Do I buy the "regular" or TPMS tire-valve-stem caps for my 2004 Acura MDX?

To my knowledge, a valve stem cap is a valve stem cap ... whether it says TPMS or not on it, shouldn't make a difference. If the TPMS is built into the valve stem (like quite a few are), everything is ...
user avatar
3 votes

Should I over- or under-inflate my tires when towing?

I had this same question, and while I mostly agree with alephzero's answer, I wanted to provide a way to actually account for the increase in tongue weight (the trailer's load on the vehicle). Let's ...
user avatar
  • 286
3 votes

Why don't people hand pump their tires?

Your bicycle air pump is designed to provide high pressure air, relatively speaking to a low volume container, the bicycle tire. If you have a high performance tire, it will be even higher pressure ...
user avatar
  • 3,592
3 votes

Why list cold tire pressure?

Because "cold" pressures are much more likely to be consistent then "warm" pressures and barring things like one side of the car having been in hot sun for a few hours should be pretty evenly "cold" ...
user avatar
  • 9,773
3 votes

Tire pressure with tires on vs off the car

The air pressure in tires are affected by temperature, which is why one measures and adds air when the tires are cold, undriven. When inflated, the shape of the tire will change slightly, as it ...
user avatar
  • 3,592
3 votes
Accepted

How long can a flat tire sit before the sidewall is ruined?

The tire shop should be able to give you the definitive word, but I'd not have an issue patching it and putting it back out on the road. As long as you don't see any dry rot occurring (cracks along ...
user avatar
3 votes
Accepted

Can low tire pressure cause the ABS warning light to come on?

The ABS and traction will detect that the rotational velocity on all tires do not match the expected. A low tire changes the effective radius of the tire, and therefore the rotational velocity will ...
user avatar
  • 2,095
3 votes
Accepted

How does tire pressure vary as a function of temperature?

There is a law in physics, the ideal gas law: pV = nRT. Here, p is the pressure, V is the volume, n is the amount of ideal gas in moles, R is the ideal gas constant and T is the temperature. However, ...
user avatar
  • 13.7k
3 votes

Wrong Tire Pressure After Walmart Installation. Intentional?

Please correct the tire pressure as soon as you can. They likely couldn't be bothered to look up the correct values for your car and chose to use reasonable "default" ones. It still is safe to drive ...
user avatar
  • 219
3 votes

2014 Honda Accord: Low Tire Pressure light still on & oil life still showing 40% after recent tire repair & oil change

Without your foot on brake, press the power button to turn on accessories. On the instrument cluster push the button several times until oil life is displayed. With oil life displayed hold the button ...
user avatar
  • 2,692
2 votes

Why don't rubber tires burn due to friction heat when the vehicle is moving

The elegantly simple answer is; if they did, we wouldn't use them. If they designed a tyre that set itself on fire, they wouldn't pass type approval and they wouldn't allow them to be sold. The ...
user avatar
2 votes

Is TPMS service recommended when buying new tires?

TL;DR: Essentially, TPMS service is replacing the wheel units on a vehicle with dTMPS where the units have either failed or where the battery is low enough that it will likely run out before the next ...
user avatar
  • 14.3k
2 votes

Should I increase my front tyre pressure

Follow the manufacturer's specs. They know what is required for the vehicle and is what you should be using. There should not be much wear difference front to rear due to this. If you rotate your ...
user avatar

Only top scored, non community-wiki answers of a minimum length are eligible