you mean the smallest ring on your cassette is an 11 tooth? same here, but i very very rarely use it. downhill at 50 or 60km/h maybe.
Yeah, i use it a lot but I'm rarely over 35kmh - That's just my cadence or whatever - I had 9 on the other (much, much lighter bike @ernesto ) and that knocked 5 mins off my commute every day.