All I'd appreciate a bit of advice here! On a ride this evening the left shifter (Tiagra 4600 triple) stopped "clicking" into indexed positions. It's on the smallest chain ring; if you push right and hold whilst pedalling it moves to the middle chain ring but no "click"; if you let go it shifts back down to the smallest chain ring. I can't push it further than the middle chain ring. To check it's not the cable, I undid the cable, and no "click" without the cable attached. Goosed or simple fix? I had a quick look for replacements and they're not exactly cheap!!!! Any advice appreciated!! Thanks, Paul.