Originally Posted by
bbattle
Many bikes with IGH have twist-grip shifters. Your hand never has to move from the handle to either shift or brake. Even the SA shifter can be adjusted using one finger.
And I friggin' HATE twist-grip shifters. I'm always holding onto just half a grip to keep from accidentally shifting (which is especially stupid when standing and pedaling hard -- I'd rather be able to just grab the bars and not worry about dropping the chain). Even with thumb shifters, I move them inboard so that I won't click a shift just by hitting a big bump.
Twist-grip shifters also won't fit onto drop bars or bars with a sharp bend without cutting and reassembling the bars. Why bother doing that when there are barend levers or the upcoming road brifter?
If someone wants to feel like they're riding a motorcycle as they crack and crunch into the next gear, I'm not gonna stop them. I'm never putting one on any bike I own, though.