brunning

i'm pretty good at taking tight corners at speed - leaning in, couterbalancing, body positioning, etc.

as i've upped my speed, however, i've been having trouble with bad roads - hitting rough spots, manhole covers, etc (riding in nyc, after all). i try to pick my lines carefully, but i didn't see a manhole cover coming today and almost spilled. i was at a pretty steep angle already and think my rear wheel hopped a bit and slid out by a food. i made it back up, but it was scary.

any advice on cornering here other than chosing a good line or slowing down?

would riding farther back on the saddle help? it feels like it's always my rear end that wants to slide out, so perhaps weighting it more would help.