Originally Posted by
fietsbob
Tooth count : ( chain ring [48] divided by rear cog [16], = 3) x wheel diameter,
say 27 inches.
is = 81 gear inches
A 3 speed S3X uses a direct gear on top, + 2 reduction gears ..
so what to change , bigger cog, smaller chain ring or both?
http://sheldonbrown.com/gears/internal.html
does the math for you.
still 48/16 .. S3X is 1st: 50.6 2nd: 60.8 High 81.0
Low is 0.63 :1 on that hub , 2nd is like the low on a AW3 hub 0.75:1 .
Thanks, I'm familiar with Sheldon's calculator. I was just wondering if certain combinations are better for wear than others. Large cog and large chainring? Small cog and small chainring? Is 1/8" stuff more durable than 3/32"? I'm just not familiar with singlespeed wisdom.