# Quick Answer: How inflated should bike tires be?

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Road bike tires are always inflated to much higher pounds per square inch (PSI) levels than mountain bike tires. … A typical road tire should be inflated to something between 90 and 120 PSI. Mountain bike tires, on the other hand, tend to run at much lower PSI.

## How full should your bicycle tires be?

Basically, you pump up your tires until they feel “firm” but not “hard” when you squeeze it firmly between your thumb and fingers. There should be a bit of give, but you should not be able to dent it in deeply. Then fine-tune the pressure by sitting with your full weight on the bike.

## Are my bike tires inflated enough?

Most every bike tire lists its recommended pressure right on the edge of the tire’s sidewall. It’s usually a range, say from 35 to 80 psi (that stands for “pounds per square inch”). The only way to know how much pressure you have is by using a pressure gauge — squeezing your tire isn’t accurate enough.

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## How do I know if my bike tires are over inflated?

As a rule of thumb, when you sit on your bike and clip in, you should visibly see a slight bulge in the tires. If not, drop the pressure 5 psi per tire and try again. Repeat until you get the bulge. Sheldon Brown put together a ton of great detail if you want to see all the math and physics.

## What happens if you over inflate a bike tire?

Putting too much air in your bike tire will make your off-road ride uncomfortable. In addition, over inflation could lead to tire blowouts which could result in accidents. Also, overinflated tires wear out unevenly and faster.

## Can you inflate bike tires at a gas station?

Yes, you can. But many stations have expensive coin operated machines, and it may not make fiscal sense. Take care to fill slowly, as gas station compressors can easily blow out a bike tire. Filling slowly also helps the tire seat properly on the rim.

## How much air should I put in my bike tire without the gauge?

A typical range for these would be between 80 and 130 psi, although racers can sometimes go as high as 160 psi. Quick tip if you’re caught inflating a road tire without a gauge and need to ballpark it: at 100 psi, a tire can barely be compressed with your thumb.

## How much can you over inflate bicycle tires?

A road racing tyre is typically inflated at 8–9 bars, and can be inflated without damage at 10–11 bars. The only problem will be that it will feel as hard as riding on rocks. However, if you use a compressor, you can overinflate a wide MTB or touring bike tyre, which should be inflated at around 3.5 to 5 bars.

## How long do bike tires stay inflated?

They do not completely deflate in a week, or even in a month, but they lose substantial pressure in that time. After five months, I would expect any bicycle tire to be fully deflated. It is normal for any article, from a truck tire to a football, to lose air over time.

## What is a good psi for mountain bike tires?

Most mountain bike tires are rated for 25-50 PSI. Road tires are usually 80-120 PSI. Gravel tires are often 40-80 PSI. While they are a good starting point, those ranges are too broad and conservative for most riders.

## What PSI should my mountain bike tires be?

Typical mountain bike pressures range from 22psi (1.5 bar) to 35psi (2.4 bar), generally with more air in the rear than the front. This is because more of your weight is on the rear, so it needs more support.

## What air pressure should tires be at?

Most passenger cars will recommend 32 to 35 psi in the tires when they’re cold. The reason you check them cold is that as tires roll along the road, friction between them and the road generates heat, increasing tire pressure.