[GaryVoshol]

The FRAME PERIMETER doesn't need to be rectangular. It can have more angles and they don't all have to be regular. But it does have to be convex.

It is defined by the outermost points of your ROBOT. Right now that includes the treads and wheels. You'll need to be able to mount your BUMPERS around them.

If the wheels and treads are below the BUMPER ZONE (lower than 4 inches) then you have another problem. You can't have anything outside your FRAME PERIMETER at the start of the match (Rule G7 D). You will need to make a FRAME PERIMETER that will encompass the space that the wheels and tread occupy. If it can't be fixed you'll be disabled.