Originally Posted by
jkanaris
Right. The funny thing is I never noticed anything until he mentioned it. I always turned the larger chainwheel on the middle rings of the back cartridge. I felt I was doing fine with an avg speed of 30K. Then my buddy comes along and says I can improve my performance with a middle ring in the front. Go figure!
No.
...and it's cogs....in the back....on the cassette.