Technical Q&A with Lennard Zinn – Grinding gears and a slight oversight
Avoiding the grindDear Lennard,I'm having a problem with my 13-39 X 53/39 Campy Chorus (2003) set-up.When it is on the 39 ring and in the 26 or 29 cog, the space between thecog and the upper roller/jockey of the derailleur is so close that thechain is rubbed/grinded in between. I have tried turning the screw on thederailleur cage but to no avail. It appears that the chain is too longeven if I followed the somewhat confusing instruction of the Campy manual.Can you please share any other tip to determine proper chain length? I'vesearched the VeloNews archives for your feature on this asI