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Updating…Cannondale derailleur hanger, gear mech hanger, dropout replacement for bike models:
The D807 hanger is for M12x1 single lead threaded axles. Not for use with the stock Speed Release axle found on the 2019+ SystemSix, which uses a double lead thread.
So find spare part for your bicycle at Elanus Parts, official distributor of PILO Precision Machining Ltd.

Full range of rear derailleur hanger types for MTB, Mountain, CX, Road and other bikes you can find here.
Find more information about derailleur hangers at frequently asked questions page or if still have questions and need assistance feel free to contact us.
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