Più il baricentro è basso, meno trazione usiamo.

This is a very common Italian comparative pattern meaning the more ..., the less ....

So:

• Più il baricentro è basso = The lower the center of gravity is
• meno trazione usiamo = the less traction we use

Italian often builds this kind of idea with:

• Più ..., più ... = The more ..., the more ...
• Più ..., meno ... = The more ..., the less ...
• Meno ..., più ... = The less ..., the more ...
• Meno ..., meno ... = The less ..., the less ...

This structure is very natural in both spoken and written Italian.

Because più here is not simply modifying the adjective by itself. It introduces a whole comparative clause: the more/lower ...

Italian often says this in a fuller way:

• Più il baricentro è basso, meno trazione usiamo.

Literally, this is something like:

• The more the center of gravity is low, the less traction we use.

In more natural English, we would usually say:

• The lower the center of gravity is, the less traction we use.

So Italian keeps the full clause il baricentro è basso, while English often compresses it into the lower the center of gravity.

Because baricentro is a noun, and Italian usually uses the definite article much more often than English.

• il baricentro = the center of gravity

In Italian, you normally say the article with nouns like this unless there is a special reason not to.

For example:

• Il motore è potente. = The engine is powerful.
• La macchina è stabile. = The car is stable.

So il is completely expected here.

Because baricentro is a masculine singular noun.

• il baricentro = masculine singular
• basso must agree with it

So:

• il baricentro è basso
• not il baricentro è bassa

Adjectives in Italian usually agree in gender and number with the noun they describe.

Compare:

• il centro è basso
• la posizione è bassa
• i centri sono bassi
• le posizioni sono basse

Usiamo means we use. Italian often uses we in places where English might prefer something more impersonal, like:

• you use
• one uses
• less traction is used

So meno trazione usiamo literally means:

• we use less traction

But depending on context, it may function more generally, almost like:

• less traction is needed/used
• you use less traction

This is not unusual. Italian often uses noi forms in technical, instructional, or explanatory contexts.

Yes. In Italian, subject pronouns are often omitted because the verb ending already tells you the subject.

• usiamo = we use
• uso = I use
• usi = you use
• usa = he/she/it uses
• usano = they use

So there is no need to say noi usiamo unless you want emphasis or contrast.

Both are possible, but the version in your sentence puts stronger focus on meno trazione.

• meno trazione usiamo
• usiamo meno trazione

Both mean essentially the same thing: we use less traction.

In this kind of più ... meno ... structure, Italian often likes to place the compared element early for balance:

• Più X..., meno Y...

So meno trazione usiamo sounds neat and rhetorically balanced after Più il baricentro è basso...

It is functioning as part of a comparative pattern, not as a simple word-for-word more.

In English, we often change the adjective:

• low → lower

Italian can express that idea with più plus a clause:

• Più il baricentro è basso...

So even though più literally means more, the whole phrase corresponds to English the lower the center of gravity is.

This is one of those cases where translating word by word can be misleading.

Yes, that is possible, but it is more marked stylistically.

• Più il baricentro è basso, meno trazione usiamo is straightforward and natural.
• Più basso è il baricentro, meno trazione usiamo is also understandable, but the word order is more emphatic or literary.

For most learners, the original version is the safer model to follow.

Grammatically, trazione is just a feminine singular noun:

• la trazione

Depending on context, it can mean things like:

• traction
• driving force
• pull
• in vehicles, sometimes part of expressions related to drive or traction control

In this sentence, the key grammar point is that trazione has no article here because it is being used in a general, uncountable sense:

• usiamo meno trazione = we use less traction

This is similar to:

• usiamo meno energia = we use less energy
• abbiamo meno forza = we have less force

The comma separates the two halves of the correlative structure:

• Più il baricentro è basso, meno trazione usiamo.

This is similar to English writing:

• The lower the center of gravity is, the less traction we use.

The comma helps show the relationship between the two linked ideas. It is very common in this kind of sentence.

Yes. This kind of structure is often used to express a general relationship or principle.

So the sentence does not have to mean only in this one moment. It can mean:

• as a general rule
• in engineering or technical explanation
• whenever this condition is true

That is one reason why usiamo may sound broader than a literal English we use. In context, it can express a general principle rather than a single action happening right now.