אלה אופניים יד שנייה.

אלה means these.

It is the normal plural demonstrative in Modern Hebrew, and it works for both masculine and feminine nouns. Here it matches אופניים, which is grammatically plural.

You may also see אלו, which means the same thing, but אלה is more common in everyday Hebrew.

In Hebrew, present-tense sentences like this usually do not use a separate word for is / are.

So Hebrew says:

אלה אופניים יד שנייה

literally something like:

These second-hand bicycles

but it naturally means These are second-hand bicycles.

This is very normal in Hebrew. In the past or future, Hebrew does use forms of to be.

The ending -יים often marks the dual form in Hebrew, which was originally used for things that come in pairs.

Examples include words like:

• עיניים — eyes
• ידיים — hands
• מכנסיים — trousers
• אופניים — bicycle / bicycles

With אופניים, this form has become the standard word for bicycle, even though English treats bicycle as a normal singular count noun.

Grammatically, אופניים is treated as a plural-form noun.

That means it often takes plural agreement, which is why אלה fits well here.

This can feel strange to English speakers, because English says a bicycle as a singular noun. Hebrew often treats אופניים more like English scissors or pants in its grammar.

In everyday spoken Hebrew, you may sometimes hear singular agreement, especially in casual speech, but the sentence as written uses standard plural agreement.

יד שנייה is the standard Hebrew expression for second-hand.

Literally, it is:

• יד — hand
• שנייה — second

So the literal idea is second hand, just like in English.

It is a fixed expression, and Hebrew speakers use it very naturally for used items that had a previous owner.

Because שנייה agrees with יד, not with אופניים.

In the phrase יד שנייה:

• יד is a feminine singular noun
• so שנייה is also feminine singular

The whole phrase יד שנייה then functions as one unit meaning second-hand.

So even though אופניים is grammatically plural, שנייה stays feminine singular because it belongs to יד.

Because Hebrew normally puts adjectives and adjective-like descriptions after the noun.

So Hebrew says:

• אופניים יד שנייה
• literally bicycles second-hand

This is the regular Hebrew word order.

English usually puts many modifiers before the noun, but Hebrew usually places them after it.

A simple pronunciation guide is:

EH-leh oh-fa-NA-yim yad shnee-YAH

A more natural transliteration is:

Ele ofanayim yad shniya

The main stresses are:

• אֵלֶּה — EH-leh
• אוֹפַנַּיִם — o-fa-NA-yim
• יָד שְׁנִיָּה — yad shni-YA

Yes. אופניים משומשים means used bicycles or used bike(s).

That is also natural Hebrew.

The difference is:

• יד שנייה specifically means second-hand
• משומשים means used

In many everyday situations, they are very close in meaning. But יד שנייה is especially common when talking about buying and selling things.

In casual spoken Hebrew, you may hear people say זה אופניים when talking about one bicycle.

But in more careful or standard grammar, אופניים is a plural-form noun, so plural agreement like אלה is more consistent.

So:

• אלה אופניים... = standard and grammatically neat
• זה אופניים... = common in casual speech, especially when referring to one bike

You can also say אלו.

Both אלה and אלו mean these.

In modern everyday Hebrew:

• אלה is more common
• אלו sounds a bit more formal, literary, or elevated

So אלה אופניים יד שנייה is the most natural everyday version.