sithisaikuru to kurosubaiku ni noru.

Here, と connects two nouns and means and.

So:

• シティサイクル と クロスバイク = city bikes and cross bikes

It is simply making a list of the things that the verb 乗る applies to.

A useful point: this is the listing use of と, not the with use. In other words, it does not mean ride with a city bike and a cross bike. It means those are the things being ridden.

The verb 乗る normally takes に for the vehicle, animal, or thing you get on / ride.

So Japanese says:

• 自転車に乗る = ride a bicycle
• 電車に乗る = ride a train
• 馬に乗る = ride a horse

This is different from English, where we use ride directly with the object.

A rough way to feel it is that Japanese treats it more like get on / be on something, so に is natural.

Using を with 乗る is normally wrong for the vehicle itself.

Yes.

The two nouns are joined into one list:

• シティサイクルとクロスバイク

Then に applies to that whole list:

• シティサイクルとクロスバイクに乗る

So the structure is basically:

• [city bike and cross bike] + に + ride

You do not need to repeat に after each noun unless you want a different style or emphasis.

For example, you could also say:

• シティサイクルにもクロスバイクにも乗る

That version emphasizes both kinds.

No. It does not imply that.

Japanese often lists multiple things that a verb applies to, without meaning the action happens simultaneously.

So this sentence means that the speaker rides:

• city bikes
• and cross bikes

In natural English, that is usually understood as rides both kinds, not literally at the same moment.

Because Japanese very often leaves out the subject when it is clear from context.

So シティサイクルとクロスバイクに乗る could mean things like:

• I ride city bikes and cross bikes
• He rides city bikes and cross bikes
• She rides city bikes and cross bikes
• (People) ride city bikes and cross bikes

The exact subject depends on the situation.

This is one of the most important differences from English: Japanese often omits information that speakers think is already understood.

乗る is the plain dictionary form of the verb.

In a standalone sentence or phrase, this form can do several jobs, such as:

• stating a general fact
• describing a habitual action
• giving a simple plain-style statement
• serving as a heading, note, or example phrase

So シティサイクルとクロスバイクに乗る may feel like:

• a plain statement: (I/they) ride city bikes and cross bikes
• a sample phrase: to ride city bikes and cross bikes

Without more context, both are possible.

They are katakana words, which are often used for:

• loanwords from other languages
• modern technical terms
• product names and categories

Here:

• シティサイクル is a Japanese term based on English-style wording and usually refers to an everyday city bicycle
• クロスバイク refers to a cross bike, usually a hybrid-style sport bicycle in Japanese usage

Even if the original source is English, the meaning in Japanese can be a little specialized, so it is best to learn them as Japanese vocabulary items, not just as direct English equivalents.

Yes, but it changes the nuance.

• と = an exact or definite list
• や = a partial list, like such as ... and ...

So:

• シティサイクルとクロスバイクに乗る
  = ride city bikes and cross bikes

• シティサイクルやクロスバイクに乗る
  = ride things like city bikes and cross bikes

If you want to say specifically those two types, と is the better choice.

Yes, as a simple example sentence or short statement, it is fine.

A more natural version in normal Japanese writing would usually remove the spaces:

• シティサイクルとクロスバイクに乗る。

Japanese normally does not use spaces between words the way English does. Spaces are often added only in learning materials to make the structure easier to see.

Yes.

For example:

• 自転車に乗る = ride a bicycle / ride bicycles

That is more general.

The original sentence is just more specific because it names particular categories of bicycles:

• シティサイクル = city bike
• クロスバイク = cross bike

So the grammar stays the same:

• [vehicle] に 乗る

A very useful pattern is:

• Noun + に + 乗る = ride / get on Noun

Examples:

• バスに乗る = ride a bus
• 電車に乗る = ride a train
• 自転車に乗る = ride a bicycle
• 馬に乗る = ride a horse

And if you list multiple nouns:

• A と B に 乗る = ride A and B

So this sentence is a good example of two important points at once:

1. と joins nouns
2. 乗る takes に for the thing you ride