You should never be using big-big![]()
I do live in a bumpy area
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I've been using it quite often, nothing wrong with it IMO?
Yeah a 'bumpy' area of London, who'd have thunk it! You actually do more climbing per mile (in your commute) than me!

I use big/big too, but only occasionally, it's generally when commuting and stopped in traffic - 1 turn or so when traffic starts to move and change up quickly. Last thing I wanna be doing in stop/start traffic (& filtering) is put in any more danger from a slow change or dropped chain. Sometimes it's only half a pedal stroke before stopping again (ie not enough for a ring change)
