It is read:
しゃたいじゅうりょう が かるい
So the whole sentence is しゃたいじゅうりょう が かるい.
Here, が marks 車体重量 as the subject of the predicate 軽い.
So the structure is basically:
This is a very common pattern in Japanese:
Since 軽い is describing 車体重量, が is natural here.
In Japanese, an い-adjective like 軽い can act as the main predicate of a sentence all by itself.
So you do not need a separate verb meaning is in the plain form.
This is different from English, where you need is. In Japanese, 軽い already functions as the predicate.
Both can be possible, but the nuance changes.
車体重量が軽い。
車体重量は軽い。
In short:
In a spec sheet, ad copy, or feature description, が is very natural when highlighting a positive characteristic.
Yes. It is a complete sentence in the plain style.
Japanese often omits です in plain statements, especially in:
So this sentence is fully valid as written.
Both are possible, but they feel slightly different.
車体重量
車体の重量
Japanese often prefers long compound nouns in technical contexts, so 車体重量 sounds natural in that kind of setting.
It is natural, but it sounds somewhat technical or descriptive, not very conversational.
You might see it in:
In everyday conversation, someone might say something more like:
So 車体重量が軽い is natural, but it has a more technical feel.
Japanese commonly uses 軽い with things related to weight, even where English might prefer low.
So Japanese thinks in terms of:
That applies both to physical objects and to stated weight values.
So 車体重量が軽い is normal Japanese, even if the most natural English translation might be something like:
Japanese and English do not always choose the same adjective.
It specifically points to 車体重量, so the sentence is about the weight value/property of the vehicle body, not just a broad statement about the whole car.
If you wanted to say simply the car is light, you would more naturally say:
If you want to focus on the body specifically:
So 車体重量が軽い is more precise and technical than 車が軽い.
Yes. 軽い can describe:
So even though 重量 is itself a noun meaning weight, it can still be the thing described as light in Japanese.
The pattern is:
Noun + が + い-adjective
In this sentence:
So the full pattern is:
車体重量が軽い = The vehicle body weight is light
This is one of the most basic and useful Japanese sentence patterns.