Rear derailleur on Cannondale Caad8 too far from cassette- at a loss
09-19-20, 07:45 PM
#26
Junior Member
Thread Starter
I sort of fixed the issue but changed several things at once but I don;t believe that was the issue as I had tried 2 different cable housings.
Will explain in detail at the end.
Will explain in detail at the end.
09-19-20, 08:11 PM
#27
Junior Member
Thread Starter
solved...sort of?
I tried several other 10sp. setups to no avail.
tried Trakhak's recommendation and checked my frame alignment, which was spot on- 3.1mm on both side of the seatpost.
I then checked the derailleur hanger tab (i do not have the ParkTool FFG-2 so fabricated something from rods & tools used in a machine shop environment- crude but same principle)
Sure as sh@#, the hanger tabs were out of what by about 2.5mm.
I did what is not recommended and used a big C-Clamp on the RD hanger tab and tweaked in back and is now nice and parallel to the other side.
before tweaking the tab, I placed a wedge inside the tire channel so I would not squeeze the dropouts and make the inside smaller than the needed 130mm.
I will monitor the integrity of the welds for stress and might even try to take it to an xray machine that I may have access to.
In the end, if I broke the frame then I'd have felt victorious at least in one way
I have to admit that I did switch the 10s setup to a 9s Shimano setup that I removed from a 04 Zurich (shifters, RD, cassette and chain) that I also had and that worked like a charm.
I think I owe it you everyone that helped with commenting (my curiosity too) what will happen if I place the 10s setup back on there. I'd likely sawzall the frame and 10s compoments to pieces out of frustration..........
Attached are pics of the bike before I tweaked the RD tab and did not take pics afterwards as I don; think a pic. could show the difference.
Oh yeah, the 9s cassette went on the first set of wheels that I tried with the 10s setup.
Thanks to everyone that chimed in and I learned several things regarding frame and RD tab alignment.
tried Trakhak's recommendation and checked my frame alignment, which was spot on- 3.1mm on both side of the seatpost.
I then checked the derailleur hanger tab (i do not have the ParkTool FFG-2 so fabricated something from rods & tools used in a machine shop environment- crude but same principle)
Sure as sh@#, the hanger tabs were out of what by about 2.5mm.
I did what is not recommended and used a big C-Clamp on the RD hanger tab and tweaked in back and is now nice and parallel to the other side.
before tweaking the tab, I placed a wedge inside the tire channel so I would not squeeze the dropouts and make the inside smaller than the needed 130mm.
I will monitor the integrity of the welds for stress and might even try to take it to an xray machine that I may have access to.
In the end, if I broke the frame then I'd have felt victorious at least in one way
I have to admit that I did switch the 10s setup to a 9s Shimano setup that I removed from a 04 Zurich (shifters, RD, cassette and chain) that I also had and that worked like a charm.
I think I owe it you everyone that helped with commenting (my curiosity too) what will happen if I place the 10s setup back on there. I'd likely sawzall the frame and 10s compoments to pieces out of frustration..........
Attached are pics of the bike before I tweaked the RD tab and did not take pics afterwards as I don; think a pic. could show the difference.
Oh yeah, the 9s cassette went on the first set of wheels that I tried with the 10s setup.
Thanks to everyone that chimed in and I learned several things regarding frame and RD tab alignment.
Last edited by peanstein; 09-19-20 at 08:13 PM. Reason: added detail about 9s setup
09-19-20, 08:58 PM
#28
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Join Date: Feb 2015
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Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970
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Congrats on getting the bike to work.
My son had an aluminum frame mountain bike and the dropout was just slightly off, maybe 1mm. I ended up modifying the inside (attach) surface of the hanger to compensate, rather than bend the dropout. So far so good; not that you need that info at this point in time.
John
My son had an aluminum frame mountain bike and the dropout was just slightly off, maybe 1mm. I ended up modifying the inside (attach) surface of the hanger to compensate, rather than bend the dropout. So far so good; not that you need that info at this point in time.
John
