Sterling has operated three "Quints" during its history. A quint is a combination ladder truck and engine company and offers a department flexibility in how the truck operates. Quint 618 in Sterling is a 2008 Spartan Gladiator/Smeal 105' rearmount and is also equipped with a 2000/500. It replaced a 2000 Spartan/Smeal 75' rearmount with a 1500/500.
Sterling's Quint 618 also is a back up ladder truck when Tower 611 is out of service.