06-18-2009, 04:43 PM
I have a new road bike with Dura-ace drivetrain. The indexing is not quite right and it doesn't matter what I do, it will not completely shift correctly. My high and low limits are set correctly and everything seems properly aligned. Shifting down the cog to the highest gears seem to work fine. However, shifting up is not orderly. It misses a shft with a click. In other words, clicking the shifter once to shift up from gear 12 (highest gear) to 13 nothing happens, clicking again (click 2) the chain moves to 13; clicking again (click 3), nothing happens, click again (click 4) the chain moves from 13 to 14. All other gears upward work fine from there. I've tried adjusting the barrel adjuster many times (with 1/8 and 1/4 inch turns) with mixed results. If I adjust the barrel adjuster to make the shifting upward seemless, shifting down the cog becomes a problem.
I've also looked at the cables to make sure there are no frays or kinks and there are none.
Do you have any idea what could be going on and how I can possible fix this? Is the STI shifter for the rear derailluer defective?
I've also looked at the cables to make sure there are no frays or kinks and there are none.
Do you have any idea what could be going on and how I can possible fix this? Is the STI shifter for the rear derailluer defective?