1. At the Shimano site the rear derailleurs (RD-M960) are specified to service a 11T minimum sprocket and 34T maximum sprocket and 22T maximum front difference. All this information is clear to me., but I do not understand the specification called "Total Capacity", 43T for SGS and 33T for SG. I understand that SGS (the derailleur with super long arm) can take up more slack than the SG (long arm) and also handle a larger rear sprocket, but what does the notation 33T and 43T actually refer to? 2. In all previous groups from Deore to Deore XT there was always a crank and a front derailleur that could be used with a maximum 48T front sprocket. On the XTR (M960 series) there seems to be no option to fit a larger than 44T sprocket on the crank and the front derailleur can only service a 46T sprocket. Is this right or is it something like a FC-M961 crank around the corner? I will build a cross/hybrid with 700C wheels and 11-34 rear sprocket and 26-36-48 crank and was considering the XTR group M960. Do I really have to stick with XT if I shell keep my favorite gear span?
Erik L (antispam: replace "com" with "no" in my e-mail address if you want to communicate with me directly, not recommended if you communicate about a news topic.
1. At the Shimano site the rear derailleurs (RD-M960) are specified to service a 11T minimum sprocket and 34T maximum sprocket and 22T maximum front difference. All this information is clear to me., but I do not understand the specification called "Total Capacity", 43T for SGS and 33T for SG. I understand that SGS (the derailleur with super long arm) can take up more slack than the SG (long arm) and also handle a larger rear sprocket, but what does the notation 33T and 43T actually refer to?
The sum of the difference between the largest and smallest chainrings and the difference between the largest and smallest sprockets.
This is not a hard restriction; you can use a chain long enough to acommodate the big-big, and live with the fact that it will rattle in the small-small - it's not like you want to use it. -- David Damerell <[email hidden]> Distortion Field!
