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I think Suntour did a cloverleaf crank; a quick Google suggests SunXCD have resurrected them? Still reasonably pricy, mind: https://www.veloduo.co.uk/products/sunxcd-rene-herse-style-double-chainset?variant=16760881287
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anyone seen any other cranksets that look similar?
https://www.veloduo.co.uk/products/sunxcd-rene-herse-style-double-chainset
If it didn't have a set of IRD Defiant cranks already, I would've been all over this. Fantastically sensible chainring size choices.
Looks like Rene Herse