Lốp xe đã nổ.

Lốp xe means tire.

It is made of:

• lốp = tire
• xe = vehicle / car / bike, depending on context

So lốp xe is literally vehicle tire.

A useful distinction:

• lốp xe = tire
• bánh xe = wheel
• xe = vehicle

In everyday speech, Vietnamese often uses short noun combinations like this without needing words like the or a.

Đã is an aspect marker. In this sentence, it shows that the event has already happened or is completed.

So:

• Lốp xe nổ. = The tire bursts / the tire burst / the tire has burst.
• Lốp xe đã nổ. = The tire has already burst / the tire burst.

Vietnamese does not mark tense the way English does, so words like đã, đang, and sẽ help show time or aspect:

• đã = past/completed
• đang = ongoing
• sẽ = future

Here, đã helps make it clear that the blowout has already occurred.

Yes, nổ literally means explode, go off, or burst. But in Vietnamese it is also the normal word for a tire blowing out.

So lốp xe đã nổ is a natural way to say:

• the tire burst
• the tire blew out

It does not necessarily mean a dramatic Hollywood-style explosion. For tires, nổ is the standard verb for a sudden burst.

Examples:

• Lốp xe bị nổ. = The tire blew out.
• Xe bị nổ lốp. = The vehicle had a tire blowout.

The pattern is:

Subject + đã + verb

So here:

• Lốp xe = subject
• đã = completed/already marker
• nổ = verb

Full structure:

• Lốp xe đã nổ.

This is a very common Vietnamese sentence pattern.

Unlike English, Vietnamese does not need a form of to be here, and it does not change the verb for tense.

Yes, you can, but the nuance changes slightly.

• Lốp xe nổ. = The tire bursts / burst / has burst, depending on context
• Lốp xe đã nổ. = The tire has already burst / the tire burst

Without đã, the sentence can sound more neutral and more dependent on context. With đã, it is clearer that the event is completed.

In natural speech, Vietnamese also often uses rồi:

• Lốp xe nổ rồi. = The tire has burst already.
• Lốp xe đã nổ rồi. = The tire has already burst.

That last version adds extra emphasis that the event has happened.

This is an important difference.

• nổ lốp = the tire blows out / bursts suddenly
• thủng lốp = the tire gets punctured

So:

• nổ lốp is usually more sudden and dramatic
• thủng lốp can be just a hole in the tire, causing it to go flat

Related expressions:

• xẹp lốp = the tire is flat / loses air
• bị xì lốp = the tire leaks air

So if you want to say the tire blew out, nổ is right. If you want to say the tire got punctured, thủng is better.

Lốp is very common, but you may also hear vỏ xe.

Often:

• lốp xe = tire
• vỏ xe = tire, especially the outer tire

In many everyday situations, they overlap.

However, learners should know that:

• bánh xe is not the same as lốp xe
• bánh xe = wheel
• lốp xe / vỏ xe = tire

If you are talking about a blowout, nổ lốp is the common phrase.

Vietnamese classifiers are not always required.

You usually use a classifier when:

• counting things
• specifying a particular item
• pointing something out

For example:

• một cái lốp xe = one tire
• cái lốp xe này = this tire

But in a simple statement like Lốp xe đã nổ, no classifier is needed.

This is very normal. Vietnamese often uses bare nouns in general statements.

A rough pronunciation guide is:

• lốp ≈ lope (short, with a rising tone)
• xe ≈ seh / syeh depending on accent
• đã ≈ zah with a broken/creaky dipping tone
• nổ ≈ nor with a dipping-rising tone

A few notes:

• đ is pronounced like English d
• plain d in Vietnamese is different from đ
• x in xe sounds like s in northern Vietnamese
• tones matter a lot:
  • lốp has a sắc tone
  • đã has a ngã tone
  • nổ has a hỏi tone

If you are learning tones, focus especially on đã and nổ, because they are easy to confuse.

Yes. Xe is a broad word meaning vehicle, so lốp xe can refer to:

• a car tire
• a motorbike tire
• a bicycle tire
• another vehicle’s tire

The exact meaning depends on context.

If you want to be more specific, you can say:

• lốp xe hơi = car tire
• lốp xe máy = motorbike tire
• lốp xe đạp = bicycle tire

So the sentence by itself is general: The tire has burst.

Yes, it is grammatical and understandable, but in real conversation they might also say some more idiomatic alternatives depending on what they want to emphasize.

Common alternatives:

• Xe bị nổ lốp. = The vehicle had a tire blowout.
• Lốp xe bị nổ. = The tire burst.
• Lốp xe nổ rồi. = The tire has blown out already.

The original sentence Lốp xe đã nổ is fine, but everyday speech often uses bị or rồi in this kind of situation.

Bị often marks something negative or unfortunate happening to the subject.

So:

• Lốp xe đã nổ. = The tire burst.
• Lốp xe bị nổ. = The tire got blown out / the tire was burst

With bị, the sentence can sound more like an unwanted event happened to the tire.

For accidents, damage, and problems, bị is very common:

• Xe bị hỏng. = The vehicle is broken.
• Kính bị vỡ. = The glass got broken.
• Lốp xe bị thủng. = The tire got punctured.

Here, nổ is being used intransitively: the tire itself bursts.

So:

• Lốp xe đã nổ. = The tire has burst.

But in Vietnamese, nổ can appear in different patterns depending on the context:

• Bom nổ. = The bomb exploded.
• Súng nổ. = The gun went off.
• Nổ máy. = Start the engine / fire up the engine

So the core idea is explosion / sudden bursting / going off, but the exact English translation changes with the object or subject.

For tires, burst or blow out is usually the best translation.