In addition to the different lengths, the buses are available with several powertrain options including traditional diesel, CNG, LNG, Propane, and diesel-electric hybrid.

The most recent and currently sold version is the E-Z Rider II BRT with bus rapid transit styling and features, which was introduced in 2008.

[13][14] The E-Z Rider II also was sold with the ISE ThunderVolt hybrid-electric propulsion, including at least four buses (to Big Blue Bus serving Santa Monica, California) with gasoline-fueled APUs and similar electric traction equipment.

In more recent years, ENC has started offering the Allison Transmission H 40 dual-mode hybrid system, which has been proven much more reliable in applications with transit agencies across the nation.

The H 40 hybrid system is coupled to the engine in lieu of a conventional transmission and offers continuously variable gear ratios with integrated assistance from a 600 V(AC) electric traction motor that is capable of driving the bus on electricity alone if needed; separate regenerative braking, power conversion, and energy storage modules are included.

[17][18] In 2021, the San Francisco Municipal Railway ordered 30 E-Z Rider II BRT coaches equipped with the H 40 hybrid system.

The TB30-FCH was built on a 30' E-Z Rider II chassis, and equipped with a UTC Power hydrogen fuel cell and the ISE ThunderVolt series hybrid powertrain.