Originally Posted by
tracyfrombklyn
I'm a new-ish cyclist who is now commuting to work on my Giant Cypress, and some of it is uphill. On a flat surface, I ride in second gear on the left and third on the right and I usually downshift to second gear on the right when I hit a hill. Each time, it seems like the gear change doesn't "catch" right away...the pedals feel slack as I go around three or four times before I feel the change. And sometimes there's quite a large clunking noise.
You may be shifting with a load which doesn't work well up front (the derailleur is on the high tension side of the chain) and is a little rough in back.
You want to slow down your pedaling so there isn't any appreciable resistance on the pedals, shift gears, and pedal normally once the chain gets done moving.