Random question:

I'm wondering how difficult/expensive it would be to raise the gearing on a Birdy LX/XT (often called the "Speed" model I think). Bear in mind that I have never changed anything on any bike, ever, and don't even own a wrench. I would probably have to buy a wrench, first of all.

Its top gear is apparently 88 gear inches (the same as the more expensive Capreo model, I think), which might be enough... Or it might not. Since smaller wheels lose momentum faster, I don't feel like I can easily predict what I'll want. I do know the top gear of 74 gear inches on my Brompton 2SL is not high enough, though it's not terribly low either.

The SRAM/Touring Birdy has a top gear of 120 gear inches, but it's also about two pounds heavier. I rode that model once and found the weight to be a bit of a problem.

Any opinions appreciated.