Tarantula Hill is a short but fairly steep (~15% grade) paved trail in Thousand Oaks, CA. The Super 73 with 40/21 gearing has no problem chugging up it with zero pedaling required.
https://www.lithiumcycles.com
https://www.hikespeak.com/trails/tarantula-hill-hike-thousand-oaks-dawns-peak/?view=trail-description