La manxa infla el pneumàtic sobre la llanta.

Manxa literally means bellows, and by extension it can also refer to a pump, especially a manual one.

So in this sentence, la manxa is the thing that pushes air in.

A learner should also know that in everyday Catalan, bomba can also be used for a pump, depending on the region and context.

Catalan normally uses definite articles very naturally with specific nouns, just as English uses the.

Here:

• la manxa = the pump
• el pneumàtic = the tire
• la llanta = the rim

In a sentence like this, leaving the articles out would sound wrong.

Because l’ is only used before a vowel sound or silent h.

Pneumàtic begins with a consonant sound, so Catalan uses el, not l’:

• el pneumàtic

Even though the beginning pn- may feel unusual to an English speaker, it is still treated as a consonant beginning.

Because nouns in Catalan have grammatical gender.

You usually have to learn each noun together with its article:

• la manxa → feminine
• el pneumàtic → masculine
• la llanta → feminine

Sometimes the ending helps:

• nouns ending in -a are often feminine
• nouns ending in -tic are often masculine

But this is not a perfect rule, so it is best to memorize the noun and article together.

Infla is the third-person singular present tense of the verb inflar, meaning to inflate.

So:

• jo inflo = I inflate
• tu infles = you inflate
• ell/ella infla = he/she/it inflates

In this sentence, la manxa is singular, so the verb is infla.

Yes. This sentence uses the very common order:

subject + verb + object + prepositional phrase

So:

• La manxa = subject
• infla = verb
• el pneumàtic = direct object
• sobre la llanta = prepositional phrase

Catalan word order is often similar to English in straightforward sentences, although Catalan can be more flexible when the speaker wants emphasis.

Sobre usually means on, over, or on top of.

Here it connects el pneumàtic with la llanta, so it tells you the tire is being inflated on the rim or over the rim, depending on the context shown to the learner.

A useful point:

• sobre often suggests physical position or contact
• it is not just a random preposition; it helps describe where the tire is in relation to the rim

In practical terms, it gives extra information about the situation of the tire while the action happens.

So the idea is that the tire is being inflated in relation to the rim.

Learners do not need to overthink this too much at first. The main thing to notice is that Catalan often places this kind of location phrase after the noun it relates to in a sentence like this.

A rough English-friendly guide is:

• manxa → roughly MANY-sha
• pneumàtic → roughly pneu-MA-tik
• llanta → roughly LYAN-ta

A few important sound notes:

• ny / nx type sounds in Catalan can be tricky for English speakers
• ll is often a palatal sound, something like ly
• the start of pneumàtic may feel awkward because of pn-; different speakers and varieties may handle that cluster a bit differently

The most important stress here is:

• pneuMÀtic

The accent mark shows where the stress goes:

• pneuMÀtic

Without the accent, a learner might stress the wrong syllable.

Catalan spelling uses accent marks partly to show pronunciation, especially when the stress does not follow the default pattern. So the accent here is a big pronunciation clue.

It means the tire.

That is an important distinction:

• pneumàtic = tire
• llanta = rim
• roda = wheel

So this sentence is carefully distinguishing the rubber tire from the metal rim.

It is a real and understandable word, but depending on the region or situation, many speakers might also say bomba for a pump.

So as a learner, it is useful to know:

• manxa can mean bellows or a manual pump
• bomba is also common for pump

That means the sentence is grammatically fine, but vocabulary choice can vary in real life.