Jur - the Brommie rear dropout spacing is what, 112mm OLD? Aren't many widerange hubs that'll fit in that space without modifying the rear triangle, which I'm loathe to do.

One must take into account the Brommie is pretty expensive already, further modifications to widerange gearing get even more expensive, and as far as I'm concerned, the Schlumpf drive would be in the astronomically expensive category.

On my M3L, the only way I could reasonably get lower gearing at the least cost is to go to a smaller chainring setup. But even then, the gearing would still be much too high for me. I'm a little guy and I like to spin as opposed to mash. We all have different needs out of our bikes. If you find your 10 speeds work for you, great, but not all of us have the same gearing requirements for whatever reasons.