Bicycle Mechanics - Shimano 105 Front Derailleur Capacity

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PDA
rdtompki
02-06-09, 09:49 PM
Looking to change the small chainring on my wife's FSA Gossamer triple cranket. Current setup is 50-39-30 and she is looking to change the 30 to either a 26 or 24. It looks like the FD will handle the 26 and possibly the 24. Can anyone confirm? Previous thread convinced me to keep the RD at 12-27 (10 speed) and the granny chainring would only be used for really steep stretches. If the Shimano 105 FD doesn't have the capacity can anyone recommend a FD of equivalent quality?

Bill Kapaun
02-06-09, 10:51 PM
http://techdocs.shimano.com/techdocs/blevel.jsp?JSESSIONID=JNfCRJn2X6yyPWP0Th5Zv1Ly5KXykQWGpPWVJXhl4bGHrhgJlHxD!-1991578515&ASSORTMENT%3C%3East_id=1408474395181679&FOLDER%3C%3Efolder_id=2534374302051113&bmUID=1233985474651
HillRider
02-07-09, 06:15 AM
The fd will handle it. Shifting from the granny to the middle ring won't be as fast as with the 30T but it will be ok. I recommend a chain watcher for this set up.

rdtompki
02-07-09, 08:25 AM
HillRider,
Thanks. I had ordered a chainwatcher at the same time. Going to fit a 24t to my wife's bike and thinking about 26t for mine. I'm trying to avoid the small ring completely, but when I need it I really need it. We're both in our 60's so killing ourselves getting up 10-12% grades doesn't seem wise.