I don't have the EZ-Flex system and I've read that some cracking may occur and it has to be pretty severe to be considered a problem. I recall reading somewhere than the length and the depth of any crack has to be considerable before replacing them.
I don't know how bad yours are, and it probably depends on the roads you've traveled and how deep or long the cracks are, but this sure seems premature. If you took your rig back to whomever is responsible they'll probably just say it's normal and tell you to slow down when traveling on rough roads. Do you or have you ever parked anywhere that leaves the suspension very stressed (uneven ground, left on a turn, etc.)?
Maybe you should take it back and let them evaluate it. Not because the cracks are there making the rubber replaceable (apparently some cracking will occur) but because they occurred in the first place and this seems very immature. Maybe they were installed incorrectly and thereby incurring this damage quicker than normal.
Please, keep us posted.
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