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Anyone ant experience of these Bolany brand cassettes on eBay direct from China?
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F202387380043
No idea, but I bawked a bit a their alternate black/gold sprocket cassette. That's going to look like a dirty bee in no time.
Doesn't seem sufficiently cheaper than Sunrace to make it worth the risk.
Looks like they are all steel but with the black sprockets pretending to be aluminium... I bet the 11-52 weighs a fair chunk. Like Martin says, they don't look much of a good deal compared to Sunrace to be worth a punt - and there's nothing wrong with Sunrace either IME.