Falkon, if all you are concerned about is having a different small chainring, you can probably swap out your 34 for a 42 or similar. I find that when riding my road bikes unloaded, I spend the vast majority of the time in the 42 (with a 12-25 cassette) unless I'm climbing the really steep hills. If I had an 11-30 cassette, I could probably get by with just a 42 up front unloaded but since I do sometimes carry loads on those bikes, the 30 is nice to have.