Originally Posted by kmart
The hardest part about long distance is all the sitting. Make sure you have a comfy pair of shorts and a good saddle dialed in. One good reason to do a a 50 or 60 mile ride before the century is to see if you can sit comfortably for that long.
+ 1
Your butt could be your limiting factor. Be sure to wear a comfortable cycling short and use/bring some chamois cream, bag balm, etc, just in case.