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I am trying to figure out the right part to replace this bolt that broke. It went through the rear frame of bike into derailleur to a shimano dyna sys II unit. I believe it is a hanger bolt but the ones I find online don't look exactly like it as it has a smooth portion (where the break is) that I don't see on the online. Please see attached photoS and help. So lost.

Thanksenter image description hereenter image description here

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    What frame is this? This is frame-specific. What type of bike is this? – Vladimir F May 28 at 16:50
  • its a Norco Killer B – justlookingtogetout May 29 at 10:03
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This looks like the Syntace 142 mm X-12 axis bolt that also serves as the derailleur hanger.

See https://www.pinkbike.com/news/syntace-142mm-12-norco-2011.html

Syntace catalogue (there are several lengths):
https://www.syntace.com/en_GB/products/liteville/accessories-spare-parts/630/x-12-screw-for-derailleur-hanger-28.5mm

enter image description here Photo Syntace

In shops (be sure to buy the right length):
https://www.bike-components.de/en/Syntace/X-12-Derailleur-Hanger-Bolt-p24466/
https://www.bike-discount.de/en/buy/syntace-x-12-screw-for-derailleur-hanger-28.5mm-44555

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  • I think you are 100% right. looking at my frame and the bolt - the top threads do not engage in any thread on the bike frame. I likely can just get a same length bolt to hang the derailleur from right? – justlookingtogetout May 29 at 10:11
  • @justlookingtogetout Yes, if it is Norco, it should be this one, see the pinkbike.com link. Check for the right length. You can measure the current bolt. Theoretically, you should have received a spare with your bike. – Vladimir F May 29 at 10:16
  • Thanks for the help. ordered the part and will let you know how it goes. Much appreciated. – justlookingtogetout May 29 at 15:32

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