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Following on from [url= http://singletrackmag.com/forum/topic/wonky-rings-one-year-on-feedback ]this thread[/url] about BETD Onekey rings, anyone know what the Shimano centrelock cranks referred to [url= http://www.mountainbikecomponents.co.uk/items.asp?CategoryID=440&Name=Goldtec+OneKey+Rings ]here[/url] are?
It was a system used in the mid/late 90s where the crank had splines to take either a spider with 5-bolt compact-drive rings, or a spider with 4-bolt compact-drive inner and middle, and integrated outer ring(rivetted on).
So it falls into the category of 'of historical interest', then?
I wonder why they've not sacked it off and started doing SRAM spiderless instead.