does cs-8000 replace cs-6800 ?
End my pain, please. Based on searches here, looking at convoluted Shimano compatibility charts, etc etc etc... way too much time invested... Time to replace the CS-6800 11-28. Can I use the CS-8000 11-28, or do I need to "stay back" ? And, looks like if I want to go to 30, I need a GS. Ya? Nah ? Thanks in advance.