What if you can't spin?

I wouldn't put Pentonville Road in the hill bracket??... I'd give it a mild incline rating (gets you breathless but can be done on a few ales) Hills are those you put your full body weight on the pedal and it doesn't go forward. but they don't have glaciers cause then they would be mountains

it's a hill to the hundred of other cyclist who commute up and down that hill everyday.

it's always fun overtaking them on their big heavy hybrid and bouncy brompton without even looking sweaty and exhausted.