The two speed is an obvious choice to save weight, but with the limited gears you need to pick you options well as you can easily be left churning a massive gear or spinning out too quickly!
It is very common to increase the chainring size, 60t seems to be the biggest option without too many issues. Larger hits the front fork hook / the chainstay. On my personal bike I have used a 122mm BB to stop the chainring contacting the chainstay when folded.
The stock ratio / MPH for RPM/cadence of 90 is - 3.38-4.5 / 15.1-20.1 mph.
Ratios/speed for alternative ring sizes;
56t - 3.5-4.67 / 15.6-20.8mph
58t - 3.63-4.83 / 16.2-21.6mph
60t - 3.75-5.00 / 16.7-22.3mph
The BWR with 50t has a gear range of 302%, ratio of 1.99-6.03 with MPH per 90 RPM (cadence) at 8.9-26.9mph.
So with a 60t x 12/16 you would need to pedal at 108.5 RPM to equal a BWR hub using 50t 13/16 at 90 RPM.
It is very common to increase the chainring size, 60t seems to be the biggest option without too many issues. Larger hits the front fork hook / the chainstay. On my personal bike I have used a 122mm BB to stop the chainring contacting the chainstay when folded.
The stock ratio / MPH for RPM/cadence of 90 is - 3.38-4.5 / 15.1-20.1 mph.
Ratios/speed for alternative ring sizes;
56t - 3.5-4.67 / 15.6-20.8mph
58t - 3.63-4.83 / 16.2-21.6mph
60t - 3.75-5.00 / 16.7-22.3mph
The BWR with 50t has a gear range of 302%, ratio of 1.99-6.03 with MPH per 90 RPM (cadence) at 8.9-26.9mph.
So with a 60t x 12/16 you would need to pedal at 108.5 RPM to equal a BWR hub using 50t 13/16 at 90 RPM.
