Рама нова, але кермо рухається.

In Ukrainian, the verb to be is usually omitted in the present tense.

So:

• Рама нова = The frame is new
• literally: Frame new

This is completely normal in Ukrainian.
If you want a past or future tense, then a form of бути (to be) appears:

• Рама була нова = The frame was new
• Рама буде нова = The frame will be new

Because нова agrees with рама.

Ukrainian adjectives change their endings to match the noun’s:

• gender
• number
• case

Here, рама is:

• feminine
• singular
• nominative

So the adjective must also be feminine singular nominative:

• нова

Compare:

• нова рама = new frame
• новий велосипед = new bicycle
• нове кермо = new handlebar/steering wheel

• рама is feminine
• кермо is neuter

You can often guess gender from the ending:

• nouns ending in -а / -я are often feminine → рама
• nouns ending in -о / -е are often neuter → кермо

That is why:

• Рама нова
• Кермо нове

Both рама and кермо are in the nominative case.

That is because they are the subjects of their clauses:

• Рама нова = The frame is new
• кермо рухається = the handlebar is moving

The nominative is the basic dictionary form of a noun.

але means but.

It connects two contrasting ideas:

• Рама нова = The frame is new
• але кермо рухається = but the handlebar is moving

Its position is very similar to English but:

• X, але Y

The comma before але is also standard, just like English often uses a comma before but in compound sentences.

рухається means moves, is moving, or is in motion, depending on context.

It comes from the verb рухатися = to move

So:

• кермо рухається can mean
  • the handlebar moves
  • the handlebar is moving

Ukrainian present tense often covers both the simple present and the present continuous, so context decides the best English translation.

The ending -ся is a very common Ukrainian verb ending. It often corresponds to a reflexive or intransitive meaning.

Here:

• рухати = to move something
• рухатися = to move, to be moving

So:

• Я рухаю стілець = I move the chair
• Стілець рухається = The chair is moving

In this sentence, кермо рухається means the handlebar itself is moving, not that it is moving something else.

Because кермо is singular, and рухається is a singular present-tense form.

The verb is 3rd person singular:

• він/вона/воно рухається = he/she/it moves

Since кермо is a singular neuter noun, Ukrainian uses the same verb form as with it in English:

• кермо рухається = it is moving / the handlebar is moving

Ukrainian has no articles.

So a noun like рама can mean:

• a frame
• the frame

and кермо can mean:

• a handlebar
• the handlebar

Context tells you which one is meant.

That’s why:

• Рама нова, але кермо рухається can be translated as
  The frame is new, but the handlebar is moving
  or, in another context,
  A frame is new, but a handlebar is moving

Usually the natural English translation uses the here.

The given word order is natural, but Ukrainian word order is more flexible than English.

Neutral order:

• Рама нова, але кермо рухається.

You could also rearrange parts for emphasis, for example:

• Кермо рухається, але рама нова.

That changes the focus slightly, but the basic meaning stays similar.

In Рама нова, placing the adjective after the noun is especially normal in this kind of predicate structure:

• Рама нова = The frame is new

If you say нова рама, that usually works more like a new frame as a noun phrase.

A rough pronunciation guide is:

• Рама ≈ RA-ma
• нова ≈ NO-va
• але ≈ a-LE
• кермо ≈ ker-MO
• рухається ≈ roo-KHA-ye-tsya

A few useful notes:

• х sounds like the ch in Scottish loch or German Bach
• є in -ається gives a ye sound
• ся is pronounced roughly like sya

So the whole sentence sounds roughly like:

RA-ma NO-va, a-LE ker-MO roo-KHA-ye-tsya.

They are related, but not always identical in usage.

• кермо is the standard Ukrainian word for steering wheel or sometimes handlebars/control steering part, depending on context
• руль is also used in some contexts, especially colloquially or under Russian influence

In a learner sentence like this, кермо is a good standard Ukrainian choice.

Depending on the object being discussed, English might translate it as:

• steering wheel
• handlebar
• bars

So the exact English word depends on context, but the Ukrainian grammar stays the same.

The comma separates two clauses joined by але (but):

• Рама нова
• але кермо рухається

In Ukrainian, a comma is normally used before conjunctions like але when they join two clauses.

So the punctuation here is standard and correct.