Southern California electric bicycle manufacturer Luna Cycle has just released its latest high-power, high-performance electric bicycle. But don’t get your hopes up for throwing a leg over a Luna X2 anytime soon; the popular e-bike sold out almost immediately upon its unveiling.

The Luna X2 follows two years after the release of the groundbreaking Luna X1 enduro e-bike and adds several key improvements.

The carbon fiber X2 houses a 20% larger battery, upgraded rear suspension linkage, a new frame design, and Luna’s V2 Ludicrous controller option for extreme power.

The upgraded battery nows comes in at 48V and 17.5Ah, or around 820 Wh of capacity. The battery is removable but mounted inside of the downtube for a sleek, hidden look. From a quick glance, it’s not obvious that the bike includes electric assist at all.

Despite the stealthy appearance, the X2 packs in some serious assistance. That mid-drive motor down by the pedals is a Bafang M600, which is one of the most powerful and torquiest electric bike mid-drive motors on the market.

Luna has modified the motor even further though, opting for its own custom controller options known as the Ludicrous controller (hmm, sounds familiar). That higher power option unleashes a full 2,500 watts of power from the unassuming motor.