del1962 said:
Not racing, just got a specific very steep climb I plan to do, Rosedale Chimney in Yorkshire, goes up to 33%, and I want to get up without walking
Hmmmm, wish I could get up 13% gradient climbs easier. Think the Giro has a TT up a ski ramp that is something along those lines. Would aim to be as light as possible, have a bike as light as possible and in the Giro even the likes of Contador was using a 34 x 30t gear combination.
Would suggest starting with something easy like a 15% climb

, and then work up to steeper climbs.