Too steep for a fixie/ss?

Pick a gear on your current ride, that you find comfortable on the flats. Stay in that gear (voila..SS) and see if u can grind up the hills. When you find the right gear...go fixed.

I did this before I ventured into fixed gear. Made a note of the sprocket I was comfortable with and then used this to work out what Gear Inches it was.

Don't forget that generally speaking, your fixed in theory *should *be lighter than the road bike, so if you find that gear a slog on the road bike, it (again, in theory) should be a bit easier on the lighter SS/Fixed due to less components on the bike...