Our gearing is 53-42-30, with a 12-29 cassette.
Our biggest climb has been
Old Tollhouse, 6.7 miles, 7.2% average grade. We haven't repeated this feat only because of stoker descent aversion.
The steepest significant segment we've done is
Redwood Gulch (we only had a 27 cog then), 1.2 miles, 10.8% average grade.
On the Low Key Hill Climbs, we've done
Montebello,
Old La Honda,
Palomares, and
Kings Mountain Road.