I've done RAGBRAI twice on a road bike and saw hybrids on both rides (also saw a unicycle, folding bikes and one guy with no bicycle seat on multiple days). One year, my group had a guy riding a mountain bike with knobby tires finish the ride. I don't remember the mileage on my two rides, but according to their web site:
"The RAGBRAI route averages 468 miles and is not necessarily flat. It begins somewhere along Iowa’s western border on the Missouri River and ends along the eastern border on the Mississippi River."
That's an average of 468 miles over 7 days for a bit over 66 miles a day. Add in a few miles that some ride to get to their overnight and then back to the route and it's probably 70 miles for some/many. I've also seen hybrids on the full Erie Canal ride twice, and the Bike Ride Across Georgia (BRAG), 4 times. Both are 300-400 mile rides over 6 or 7 days.
Hybrids can certainly exceed 30 miles a day.
Last edited by MAK; 10-07-21 at 09:26 PM.