Now that I have your attention, no, not that kind of rubber! I love all 3 of my kids. Seriously though, the trail star hd, and the o rings on my ccdba and lev cable cover all have cracking/splitting problems. I replaced the hd as the cracks in the sidewall were deep enough to èxpose the threads in the casing. My problem is finding replacement rings for the shock sag indicator and particularly the lev cable cover. Anyone know where I can get just the o ring for the lev?