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2016 Specialized Crux Single Speed gear conversion

Old 05-04-20, 07:08 PM
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shoota 
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2016 Specialized Crux Single Speed gear conversion

So my buddy and I went to set up his (repainted) Crux 1X and never looked at the dropout first. It appears that there are no mounting holes on the dropout for a hanger. Can anyone confirm or deny that there is no hanger for this model? Anyone have any ideas?

https://www.specialized.com/us/en/cr...le-e5/p/106371

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Old 05-04-20, 07:50 PM
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You are correct, there is no dropout mounting tab for a rear derailleur. This is intended to be a single speed only. However, it has vertical rear dropouts so I'm not sure how chain tension is adjusted. The specs don't mention an eccentric bottom bracket.

If you really want to have a rear derailleur you are probably going to have to use a "claw" mount.
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Old 05-04-20, 08:24 PM
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Originally Posted by HillRider View Post
If you really want to have a rear derailleur you are probably going to have to use a "claw" mount.
Unfortunately most of the claw mounts I have seen are intended for front-facing horizontal-ish dropouts and might be difficult to adapt to that bike's vertical dropouts. I was also curious about the chain tension means.
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Old 05-04-20, 08:45 PM
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Originally Posted by HillRider View Post
You are correct, there is no dropout mounting tab for a rear derailleur. This is intended to be a single speed only. However, it has vertical rear dropouts so I'm not sure how chain tension is adjusted. The specs don't mention an eccentric bottom bracket.

If you really want to have a rear derailleur you are probably going to have to use a "claw" mount.
Originally Posted by dsbrantjr View Post
Unfortunately most of the claw mounts I have seen are intended for front-facing horizontal-ish dropouts and might be difficult to adapt to that bike's vertical dropouts. I was also curious about the chain tension means.
It's an EBB.
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Old 05-04-20, 09:16 PM
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Looks like the RD hanger can fit if you are comfortable tapping some mounting holes. Otherwise, EBB.
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Old 05-05-20, 07:06 AM
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Originally Posted by tFUnK View Post
Looks like the RD hanger can fit if you are comfortable tapping some mounting holes. Otherwise, EBB.
What do you mean "Otherwise, EBB."?
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Old 05-05-20, 08:14 AM
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Originally Posted by shoota View Post
What do you mean "Otherwise, EBB."?
It means "Eccentric Bottom Bracket". The bottom bracket shell has an eccentric insert that can be rotated to adjust the distance from the chainring to the cog and thus set the proper chain slack.
Trek's specs for that bike don't say it has one.
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Old 05-05-20, 08:23 AM
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Originally Posted by HillRider View Post
It means "Eccentric Bottom Bracket". The bottom bracket shell has an eccentric insert that can be rotated to adjust the distance from the chainring to the cog and thus set the proper chain slack.
Trek's specs for that bike don't say it has one.
I know what an EBB is, Iím the one who said thatís what it is in this thread. His comment ďOtherwise, EBB.Ē makes no sense to me. What does that have to do with finding a hanger so I can run gears?
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Old 05-05-20, 05:04 PM
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Originally Posted by shoota View Post
I know what an EBB is, Iím the one who said thatís what it is in this thread.
Yeah, I didn't notice that you were the OP when you made the EBB confirmation. I wonder why Trek's description doesn't mention it.
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Old 05-05-20, 07:17 PM
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Otherwise, (you won't really want to bodge a geared setup, so keep it as SS with an) EBB. Sorry, browsing forums via mobile, trying to keep things brief to minimize typos.
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Old 05-05-20, 08:24 PM
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Originally Posted by HillRider View Post
Yeah, I didn't notice that you were the OP when you made the EBB confirmation. I wonder why Trek's description doesn't mention it.
Probably because it's a Specialized

Originally Posted by tFUnK View Post
Otherwise, (you won't really want to bodge a geared setup, so keep it as SS with an) EBB. Sorry, browsing forums via mobile, trying to keep things brief to minimize typos.
Yeah I think we're screwed here :/ thx guys
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Old 05-06-20, 12:14 AM
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That's weird that they left the dropout like that. Should have made it horizontal or made it convertible to accept a RD.

If it were me I'd try to get the same model year RD hanger just to see if I can bolt it on, but it might not be worth the headache and time.
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