So I rode my commuter bike today to work. I just finished putting a new rack and panniers on it. Everything seems nice. I like not having the bag over the shoulder like I normally do.
My usual commute is on a relatively light ti road bike with 120psi in 23mm tires.
It felt today like I was riding with the brakes on. The commuter is a 70's lugged steel frame with flat bar and converted to 700c Vuelta Zerolite wheels that are brand new. I've also replaced the crankset with a mtb tripple and set up the rear with 7spd cassette and new DR. It's geared just like my 29er MTB with the exception of being a 7spd vs a 9spd rear.
I have 35mm road tread tires for it. I have used them on my MTB (same ones) and they roll great. On the cruiser, it feels like they are dragging like crazy. I'm not sur what to make of it. My only suspicion is that possibly the narrow wheels combined with the fatter tires leads to some type of scrubbing of the tires as they compress on the road? Is that possible?
When I'm off the bike, I can spin both wheels and they rotate freely. I don't think there is any interference from the brakes or other components. The bike just doesn't roll very well when I'm on it.
What should I be looking for? I know my MTB weighs roughly the same, has a similar upright riding position, but rolls much easier. Is it the tire/rim combo that's giving me issues or what?