I've had problems shifting from the small to big ring on and off for quite a while. It will sometimes work but if it doesn't I need to shift to my biggest gear and slow to crawling speed and that will usually coax it up. It's been into the LBS a few times and the cables have been changed and it's been fiddled with quite a bit. It tends to work ok on the stand but not so well on the road. Any ideas appreciated. It's a compact Giant Defy with sora.