Optima Bus, LLC, formerly Chance Coach Inc., was a brand of small transit buses manufactured by North American Bus Industries.

It was originally the trolley-replica and conventional bus production business of Chance Industries, Inc.

In 1998, Chance Coach, Inc. was sold to American Capital Strategies,[1] which rebranded the company as Optima Bus Corporation in 2003.

[2] American Capital subsequently sold Optima to North American Bus Industries, who closed the Kansas assembly plant on August 8, 2007, with production moved to their existing plant in Anniston, Alabama.

[3] Optima Bus was owned by North American Bus Industries, Inc.[4] until 2010, when NABI discontinued the production of its Optima and Blue Bird brand commercial bus products.