I do a regular 25 mile commute one way across London, train back myself. One of my routes includes Hampstead and Highgate, a decent amount of climb. I tried th

I do a regular 25 mile commute one way across London, train back myself. One of my routes includes Hampstead and Highgate, a decent amount of climb. I tried the 3 speed hire Bromptons, but went for the 6 speed when I purchased one. The upgrade was well worth the money, I doubt I'd be able to get up those hills on the 3 speed.