It looks like the spacer you use if you have a road 68mm bb30 shell and the 109mm axle
http://www.cannondalespares.com/Cannondale-Hollowgram-Chainset-Road-Spacer-Kit--BB30-KP483/product_detail/3-42959
?
Yea
@spotter started
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It looks like the spacer you use if you have a road 68mm bb30 shell and the 109mm axle