so i recently converted my 12-speed road bike to a singlespeed and kept the freewheel on for various reasons. i have yet to get spacers for the rear so i kept the old gears on it, but the chainline is ~98% straight. anyway, now sometimes when i walk the bike, i notice that the cranks turn, and sometimes, it doesn't. this happens both when the bike is moving forward or backward. is this supposed to happen? i'm a newb to all this bike stuff. the bike appears to work fine otherwise; i.e., i can ride it and coasting isn't a problem. my guess is that the chain's rubbing on something it's not supposed to.
i released the rear wheel once to clean the frame, but i'm pretty sure the chain is back on correctly.
thanks for any advice.
ps, i did try to search the forums for an answer, but the only keywords i could come up with were: pedals, singlespeed, cranks, etc. and that didn't help narrow my search any.