I think you should run them for awhile and see what you think. See what others are doing that run the CTR. See how much people have to dick with them. Some get lucky and don't. I have a buddy that will be doing that race this year on his Superfly 100.
You know you would be bringing tubes for a backup anyway.
I have been in the bus for 20 and riding for 22. I will not run them. My .02.
I'm sure Dave will chime in, his info is good.
1997 FZJ80, White, Locked, deflared, 5.29'd, 4-5" lift, Fox's, DC shafts F/R, 35" AT's, Metal Tech front bumper w/ winch, custom tube rear bumper, SROR sliders, IPOR skid, Custom exhaust, Snorkel, Eezi-Awn 1600, Mark's Speedo Box.
2008 Subaru WRX Wagon, mods and lifted on 27's
2001 Honda XR400 with goodies