So about a week ago, on my way home from work, I was rounding a turn at a residential intersection. Going maybe 10mph, my inside pedal connected with the pavement and nearly threw me off the bike. The only apparent damage was a pretty good scrape on the corner of the pedal.
So on my next bike commute, I noticed an extremely annoying wobble at low speeds (10-15mph). It resonates all the way from the handlebars to the seatpost. I thought, oh no, I bent my frame! But after reading a little online it sounds like pedal strikes are fairly common and no one seems to have bent a frame doing it. (BTW the bike is an '08 Volpe, steel frame)
So here are the other possible culprits that I can think of:
(1) I did tighten up my...headset, I think? This is the allen bolt at the top of the stem; I cranked it down a little because I just got the bike and found some loose bolts. I also tightened up the bracket that holds the front brake cable housing to the stem.
(2) I just noticed that the rear wheel is pretty out of true. Might be my riding weight (~210 w/backpack) is too much for the stock wheels.
Would either one of these or both result in what I am describing? Should I be looking at something else?
Thanks for any help you can offer.