Originally Posted by PenguinDeD
i have a 105/ultegra 9spd mix, and the only real time I wish I had something that shifts faster and smoother is when going up a super steep grade when lots of pressure is constantly on the cranks. Otherwise, 105 is smooth enough.
btw, I have the same complaints about the shimano altus group I have on my mtn. bike. Doesn't shift quick enough on steep climbs but it's still good enough. This could just be due to abuse though, since it was left outside rain or shine for a few years.
Check your gear change cable going to your derailleur. Pehaps a new one is a good idea including cable housing. Changed mine and now works perfectly