The bad news is that I blew a tube and my pump is broken. Fortunately, I got a fill from somebody with a CO2 cartridge. But, I wasn't able to complete my plan of doing two loops on the first section of the IM course.
The good news is that the workout was a total breeze for me. I rode for about 3 hours and averaged 15.2 mph for a total of about 46 miles.