|Compatability between 7 spd and 9 spd...||spdplayr|
Nov 30, 2001 9:00 AM
|I am currently sporting a 7 speed crank and rings but I am installing 9 spd sti shifters and rear der. Will it work (yes i already have 9 speed wheels,cassette, and chain)? I've already done the 8 spd crank and 9 spd upgrade on my Mtn bike with no prob.
What about this? I also have a 7 spd front der on the bike now. What's the input on these issues.
This is for my commuter/ rainy day/on the trainer bike so i am trying to keep cost down.
Thanks in advance!
Nov 30, 2001 10:27 AM
|But not that well. the culprit will be the narrow 9 speed chain and the wider spacing between the 7 speed chainrings. Some say using a 9 speed inner chainring will close the gap and give you better shifting. You may never get the 7 speed front der to work very well at all due to the wide spacing of the cage. A 9 Sp front der. is a pretty inexpensive item. Since you've already done this on your MTB you pretty much know what to expect - it certainly won't be any worse thatn this. The only real difference between 8 and 7 speed, besides the extra cog, is the width of the rear cogset and the required dishing. You could find yourself fighting a little bit of a chainline issue whihc can really have an impact on shifting performance. Try it and if worse comes to worse buy the few select components to get the improvements you want.|
|re:front derailer||Rusty Coggs|
Nov 30, 2001 5:40 PM
|.....may be totally incompatible with STI. If the arm the cable attaches to is perpindicular to the derailer cage, it may be. If it isn't , it just won't be.|| |