The Strike Pro and Strike Pro SE include three 14" crash pads and one 16" triple zone ride.
it's very common to assume that the cymbals pads go from left to right as follows: Crash 1, Crash 2, Ride and then Crash 3, but this is actually not the case.
When sitting behind your Alesis Strike or Alesis Strike Pro SE kit, your cymbal pads actually go in the following order from left to right Crash 3, Crash 1, Ride and then Crash 2.
Note: No matter where you physically place your cymbal pads, they will trigger in accordance to the way the layout is on the GUI of the module's screen. This is a hard wired feature.