My hybrid, I feel like I could ride over anything and it doesn't matter. Branches, railroad tracks, dirt, rocks, small cars. No problem. 700x35.
My Caad 10 5 on the other hand... scares the hell out of me going downhill at 30mph on just asphalt. 700x23
I hit a little gravel too and put me in a nasty wobble I was (thankfully) able to recover from. Seems like every little rock and pebble is out to kill me.
I never stand on this bike to pedal.
Now, I feel like I reach to far on the bike and need a somewhat shorter stem. - but doesn't a shorter stem make the front wheel -more- twitchy?