Just to clarify, a "Spoiler" is attached to the body and a "Wing" is detached from the body where the down force of a Wing is tunable and Spoilers are not tunable in RC.

While I agree that a spoiler on a Stadium Truck body can present about equal down force as most wings on the market, you can't adjust the height/angle like you can with "Wing Mounts".

I have lost both spoilers and wings during a race and the cars become essentially "undriveable" to where my laps times drop way off pace and I just need to pull the car from the track and make necessary repairs.