Originally Posted by
MrRider
True, for formatting reason you can only extend with 11-40 or 11-42 cassettes. I was wishing to know if I could eventually extended a Sunshine 11-42 cassette to 50T cassette. I'll have the cassette in my hand tomorrow, but I know the formatting is the same as the Shimano 11-42.
Since it specifically says that it is only for the M7000 and M8000 cassettes, I think it is fair to assume that it isn't for other cassettes.
If you want one, buy it and then see what will work. You can always return the Sunshine if it doesn't have enough internal clearance. But I wouldn't expect anyone to be able to tell you beforehand unless they've already done it. The internal construction of cassettes varies, and the Sunrace may be more like the SRAM than the Shimano in the way that matters.