Road Bike, Cycling Forums banner
1 - 9 of 9 Posts

·
Registered
Joined
·
186 Posts
Discussion Starter · #1 ·
Is there a Master tech sheet I can look at to see the min and max cog size I can use on a specific derailleur? Im amazed I cant find this?

My wife has a 2007 Trek 2100 WSD with a 50/39/30 and 12-25 10 spd

Im simply wanting to know the biggest cog I can put on the back?

Will a 11-32 or 11-34 be too big? 11-28 etc.

A simple chart on this seems too easy?
 

·
Registered
Joined
·
9,658 Posts
What Shimano says and the reality aren't always the same, FYI. You should DEFINITELY be able to use the biggest they say you can but you really never know how big you can actually go until you try. There are other factors beside the der. itself.
 

·
Registered
Joined
·
8,224 Posts
There are two RD-6600 derailleurs, the SS (short cage) and GS (medium cage). For a triple chain ring you likely have a GS to provide the added chain wrap. In my experience the GS will handle a 32T cassette on Trek bikes without a problem. IIRC SRAM makes a 10 speed 12-32 whereas Shimano only has an 11-32, for that reason I went SRAM on the cassette.
 

·
Adventure Seeker
Joined
·
5,115 Posts
Keep in mind you can always buy an inexpensive MTB rear derailleur that'll accommodate larger cogs too.
 
1 - 9 of 9 Posts
Top