Quote:
<R29>
BUMPERS must be supported by the structure/frame of the ROBOT (see Figure 4-6). To be considered supported:
A. a minimum of 1 in. at each end of the BUMPER must be backed by the FRAME PERIMETER,
B. the gap between the backing material and the frame must not be greater than ¼ in., and
C. no section of BUMPER greater than 8 in. may be unsupported.
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It looks like you may run into trouble here. If you have one bumper on each side, then there is no frame material to support the bumpers along the wheels at their ends for at least 1 inch (part A).
If you have bumpers that are contiguous around the corners of the robot, then with 6 inches of wheel and what looks to be at least 2 inches between the corner of the frame perimeter and the next backing along the front/back rails, then you're at the very least cutting it very close on the 8 in. unsupported (part C).