Originally Posted by
Jerrys88
Can I achieve a gear range between low 20's (and I mean NEAR 20) and 80's? How hard is it to install the Shimano Alfine on the Brompton? Does it require any frame modifications? Is it a do-it-yourself job, or something an experienced bike mechanic needs to do? Is there only one 8 speed Shimano Alfine hub, or do I need to buy a specific model (if so, which one?)? I assume it works with the derailleur my Brompton came with, yes?
Jerry, another way to extend the gear range to your liking would be to install a Schlumpf Mountain Drive to your existing 3 speed Brompton .. you could get 6 distinct gear choices ( 20/27/36/50/67/90) using a 53/13 ... advantage would be not having to bend your frame and dropouts to accept a 135mm hub... you'll have longer spokes with your 3 speed (so better spoke angles), and a much lighter rear wheel .. the rear of your bike would stay exactly the same as it is, and the two speed crank would be added in place of your existing crank.. if you want to go that route, PM me as I have a very low mile one on the shelf and could save you quite a bit of money over the price of a brand new one.