高こう速そくギヤ

noun

high gear; top gear; high-speed gear

Refers to a gear setting that allows a vehicle or machine to operate at high speed. Common in automotive and mechanical contexts.

• 高こう速そくギヤに切きり替かえると、エンジンの回かい転てん数すうが下さがる。

  When you shift into high gear, the engine RPM drops.

• この自じ転てん車しゃは高こう速そくギヤが重おもいので、平へい地ち向むきだ。

  This bicycle has a heavy high gear, so it's suited for flat roads.