nostr:npub19gg0dffcsnfsga6khq3zep4kghl8dcuv5mp52ypkrr0cy3ufmqxs39utl6 
That's a pretty impressive performance, 16 km in less than 50 minutes, with an elevation gain of 60 m, all the more so that you did it on a Brompton, not a road bike designed to go fast. Do you train regularly?