Originally Posted by
hybridbkrdr
I was passed once by a fat bike while riding a bike with Tiagra hubs and 28mm Vittoria Randonneur tires. Besides, I feel like I can get plenty of speed with the Raleigh Knox with 55mm tires. Anyway, I usually ride pretty slow to save my energy for my workouts.
EDIT: Another reason why large tires can be fast is because I won't brake for large cracks on the road etc. I found on one dirt road with 1 inch rocks I would slow to a crawl with 31mm tires at 55 PSI. With 55mm tires, they actually absorb the rocks on that road.
Being passed by someone on a fat bike may not have anything to do with tire size.
It seems like you have already determined what you prefer, and have your reasons why.