We get south westerly in the afternoon around here, and to get river from my house, I have to cycle against wind. It can often get quite windy, and it is not easy for a bike with such small wheels and only 3 choices of gears.
So, I have changed a rear sprocket on my brompton from 13T to 14T. It says that this lowers the gear by 7%. I don't know what that really means in terms of the reality, but I did a test drive the other day, and it felt like it was bit easier to travel into the gusty afternoon wind.
I don't think this is still not enough to go up on hills though. Fortunately there are not many hills around Perth, but if I was taking the bike to a trout fishing trip to NZ or any mountain streams, I would have to deal with hills.
I guess, to turn my bike into a hill climber, I will have to change a front chain ring to a smaller one (50T to 44T), but it costs $80 plus all new tools to do the job. In comparison, the rear sprocket cost me only $5. So for now, I will stick with a cheaper solution.
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