if they just use plain old serial communication, then you may be able to do it because some USB devices do just use standard serial communication. Others however use specialized drivers, and proprietary methods of transmitting data.

I *think* the way you can tell this, is if the USB devices is assigned a COM port or not. I don't have a ton of experience with this, only that I tried once to intercept my USB xbox 360 controller when using it (so I could use it like a mouse in a program I was building) but the controller isn't assigned a port number and it also has its own driver.

Since these are gaming pedals, it is also possible that you could maybe use directX to query the input from the gaming device.