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Sram/ultegra compatability
#1
My bike is a Specialized Roubaix with 105 triple components (2007). Because the frame cracked Specialized is replacing my frame with a SL3 pro. I would like to upgrade some components; Sram apex 11-32 cassette, Ultegra 6700 compact crank 50-34, and Ultegra BR-6700 brakes. Will these parts be compatible and what else would I need to change when I transfer my parts to the new frame. Thanks, Michael
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#2
Just make sure the brakes have the proper reach specs, you may want to replace the chain, and you may need to change the spindle/bottom bracket
There are two kinds of people in the world, "Those who help themselves to people, and those who help people!"
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#3
105 rear derailleur should not take a 11-32 cassette, because the largest sprocket you can put on is a 27 or 28

Is your bike have some external BB bearings like theses??

http://www.bikepedia.com/Images/image2.aspx?w=300&h=300&filename=BBST2320.jpg&f=Hawley

I can help you further if you can check on your rear and front derailleur for the model ##, it should be RD-XXX and FD-XXX
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#4
(11-14-2011, 09:51 PM)bobtravers Wrote:  105 rear derailleur should not take a 11-32 cassette, because the largest sprocket you can put on is a 27 or 28

Is your bike have some external BB bearings like theses??

http://www.bikepedia.com/Images/image2.aspx?w=300&h=300&filename=BBST2320.jpg&f=Hawley

I can help you further if you can check on your rear and front derailleur for the model ##, it should be RD-XXX and FD-XXX

I have purchased a sram 11-36 cassette and a SLX-RD-M663 as well as a Wippermann 10SO chain. I hope the 105 shifters will handle that derailleur. I still would like to get a Ultegra 6700 50-34 crankset. I believe the new frame takes a BB60 bottom bracket and a braze-on front derailleur (my 105 is a clamp on) so I'll need to replace them as well. Do you see any issues with this set-up? Thanks, Michael
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#5
Well mix-match of parts usually don't work very good, but, total capacity of the rear derailleur is fine... The only thing I don't know is do road shifters work with a MTB rear derailleur??? Is the ratio of cable plulled is the same on a road and MTB shifters?
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#6
Yes, most of the Shimano road and MTB RDs need the same amount of cable pull. On the conversion: I yould have gone with 3 chain rings in the front and a road cassette. The jumps on MTB cassettes are much too wide for my taste...
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