Brompton Mods

[Schwinnsta]

Bike Gang sent me a proto type sprocket set with 11, 14 and 17 tooth sprockets that was very easy to swap out for the two sprocket normal set up. It works exactly as the two sprocket set, just giving a higher high, an intermediate gear and a lower low. The only drawback I can see is that the 11 tooth sprocket will wear out first and it's a one piece set, so you can't just replace it the 11 tooth.

Is it alloy or steel?

 

[12boy]

It is steel. At this time of year, with 20 mph headwinds very common, having some gear inches between 85 and 55 (67) is very nice. 85 is very nice with 20 mph tailwind and 55 on a 5% grade with said headwinds is good, too.