Jeff B. wrote:
Hey Carl, quick question. Just tried my Super 9 CC on my new SC 9.9 and the rear derailleur is frighteningly close to the surface of the disc when in the lowest (Highest numerically) gear. You can see daylight but just barely. LBS feels it won't be an issue while racing but I just don't want to scar a $2300 wheel.
Any thoughts? Opinions? Prior experience?
Thx in advance. Jeff
same setup, Shimano DA Di2 RD + Zipp Super9 CC on my 2014 Speed Concept 9.9. The RD is very close to the disc when in the largest rear gear and the small front ring. I can get the disc to rub slightly if i am standing and going hard up a hill. If you are cross chained (big/big) then the cross chaining will pull out the bottom of the RD a bit more so the disc will not be quite so close.
I have considered putting a small 1mm spacer in between the cassette to space it out as i think that will help. I have not done it yet but it looks like it should work and the chain would not hit the frame in the small rear cog.
Ian