When the road tilts beyond what feels reasonable, it takes a certain kind of rider to lean into it. British hill climb specialist Harry MacFarlane has made a habit of doing exactly that—and his latest effort might be one of the most absurd yet.

On a recent trip to San Francisco, Harry set his sights on Bradford Street, widely claimed to be the steepest street in the city. With gradients reported to average a staggering 41%, this isn’t a climb you settle into—it’s one you survive. Short, violent, and completely unforgiving.

Harry didn’t just ride it—he matched the standing KOM, equalling a time that has held firm since 2020, originally set by Mike Scanlon. Four years on, and still no one has gone faster.

The numbers tell part of the story. A peak power of 1,253 watts. An average of 1,058 watts across just 14 seconds. But numbers alone don’t quite capture what a 41% gradient feels like when you’re trying to hold the bike in a straight line, let alone push it to the limit.

His verdict afterwards was simple and honest: “41% is fucking wild.”

For this effort, Harry was riding the 45/50's from our previous generation wheelsets. Since then, we’ve taken that same platform and evolved it further. Our 52/58 Superlight wheels are the replacement for what Harry used to tackle this beast of a climb.