This morning I was about 5 miles into a ride when, I started to feel more rolling resistance than I am used to. It felt like a brake was rubbing. I stopped and checked things out. I couldn't find a problem. The wheels, cranks, and chain all spun fine with no unusual resistance. Both tires had plenty of air. I couldn't hear any unusual noises either. I tried riding again, but the problem persisted. At this point I think it might all be in my head. If it is a legitimate problem it must only happen when my weight is on the bike.
Does anyone have any suggestions? Am I just crazy?
'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Try taking the bike out again on a level road. When you feel the resistance stop pedaling and see if the bike coasts normally or comes to an abnormally rapid stop. That will tell you if it's a mechanical or physical problem.
One idea, check for a broken spoke. The wheel may remain true enough to turn freely unloaded but the rim may flex enough under load to rub on the brakes.