Old 04-19-20, 09:08 AM
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Originally Posted by Jeff Wills View Post
Not as is. The fitting that goes between the shift lever and the frame needs to be flat on the underside, not curved like those shown.

I'm not sure how the Sunrace shift levers fit to that part. For Shimano shift levers that part is called a "lever boss cover".

In this diagram it is item #6 .
643 3810-1 fits a conventional round-tube frame
643 4300 fits a frame with flat-back bosses like your Cannondale.
I think you are incorrect. The “lever boss cover” (part 6 in the picture) comes with the new shifters. The shifter should just bolt onto it. The boss cover may even still be on the cable guide side as the guide needs to sit flat on the frame as well.
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