I seem to be right between the medium and large size for bike shorts, with or without bibs. Sometimes I get chaffing with either size but I'm in the market for new ones this season. I wonder, which is LEAST likely to produce chaffing; shorts that are a little too large or a little too small? I average approximately 100 miles per week, road and gravel. Sometimes 150+ miles if there is a big weekend ride. I don't race, just ride, and want to help minimize the chaffing by selecting the more appropriate size. Chamois Butt'r is great and I use it. But still, want the best size shorts/bibs.