Chinertown
Chinese Carbon Road Bikes => Road Bike Frames, Wheels & Components => Topic started by: AlexL on November 21, 2025, 05:36:14 AM
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I just bought a ZRace unchained crankset and am wondering what tool I need to secure the chainring to the crank. It’s a 20t internal spline ~33mm diameter
Have asked ZRace on Ali but they have not been helpful
Attached photos show the geometry of the locking ring.
Cheers,
Alex
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Another photo
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Probably an old Shimano BB tool used for their square taper BBs.
Something like a Park Tool BBT-22 or its many equivalents.
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Pretty obscure standard these days, weird choice. Apparently also Race Face uses such dimensions for their cranksets.
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Looks like a standard 20 tooth bb tool as mentioned above. Don't you check/confirm what the interface is before you buy ? After the spindle size, that the next thing you should check - don't want to end up with some obscure or proprietary interface.
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Pretty obscure standard these days, weird choice. Apparently also Race Face uses such dimensions for their cranksets.
I actually think most of the cheap chinese carbon cranks are using this same lockring style. I know that LEESE uses is, as does the ROCKBROS crank, Magene’s TEO, and even the super popular Elilee cranks. I’m guessing this is because they all come frome a common source or sources.
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20T Crank Extractor: https://aliexpress.com/item/1005005889404486.html
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Its not even remotely unique. Its an Easton Cinch lockring and uses a tool named the same or the generic tool linked. Just about every crank out there from China uses the Easton interface.
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Thanks all for your feedback - linked tool ordered!
This is the joys of buying from AliE.