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Front derailleur capacity for triple(3 posts)

Front derailleur capacity for triplebcm119
May 2, 2003 11:09 AM
I'm building up a bike I'll use for loaded touring in mountainous terrain. I have a 24-tooth small chainring on an old RX-100 triple crank (standard Shimano road bolt diameter of 130mm). My question is, what is the largest ring I can use for the big ring- a 46 or 48? Shimano claims the front derailleur (also RX-100) can handle a 22 tooth difference between the smallest and largest ring. But 46 tooth rings in a 130mm bolt pattern are tough to find. Can I use a 48?
re: Front derailleur capacity for tripleRusty Coggs
May 2, 2003 12:04 PM
I have heard of a 26/52 being used...that's 26 teeth.Specs are uaually conservative.
re: Front derailleur capacity for tripleSteve Bailey
May 2, 2003 6:33 PM
I use a standard, modern Ultegra triple F. derailer with a 24/36/50 ring combo (110/74BCD) and Campy Ergo shifters.

26 tooth spread. No problems.

Steve B.