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Cyclocross FD adapter

Old 01-21-18, 10:32 PM
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bikingdude
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Cyclocross FD adapter

Hey folks, planning to do a cyclocross project in the spring, and currently the frame I have in mind for it only has a top pull FD cable routing, hence rendering it incompatible with my road down pull FD and shifters. However, I've recently found out that one could use a "cable pulley adapter" to solve this issue. Have any of you folks got any experience with these things?
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Old 01-22-18, 06:45 AM
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I do not have personal experience but I understand that this is commonly done, presumably successfully. A pulley is not a new or high-tech piece of machinery. Here's a nice one from Problem Solvers: https://problemsolversbike.com/produ..._clamp_-_17312
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Old 01-22-18, 10:02 AM
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Keith Bontrager made his Cyclocross race frames including one as standard kit.

You could add a housing stop on the down tube, another clamp band, & the plastic guide under the bb
and have the cable run under the BB as well ..

I Own an Italian , steel CX frame with top tube rear, down tube front shifter routing..

of course 1 by , a 42t chainring & double chainguards in CX has a long history.. No FD needed..




...

Last edited by fietsbob; 01-22-18 at 10:12 AM.
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Old 01-22-18, 10:32 AM
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Many thousands of bikes have gone for millions of miles with these ft der cable rerouting pulleys. But they do add one more part to deal with. The first issue I think of is that they are usually in the direct line of fire from the road crap flying off the rear tire, so cleaning and the bushing/bearing maintenance can be important in bad conditions. The next is that one can route the cable one of two different ways around the pulley (as in clockwise or anti clockwise). One way will likely also route the cable to better actuate the der through its arc. Andy
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Old 01-22-18, 11:11 AM
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there were some made with a cover, to resolve the Mud spew issue..
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Old 01-22-18, 11:23 AM
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Yeah they're fine. The Problem Solvers adapter is probably the best option. I've heard of people using shower door pulleys too.
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Old 01-22-18, 12:53 PM
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Originally Posted by fietsbob View Post
there were some made with a cover, to resolve the Mud spew issue..

Ha Ha! Can I sell you this bridge? It uses sealed bearings that never go wrong Andy
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Old 01-22-18, 01:42 PM
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I think the NL made Empella CX frames included them..


that was before 3D printers.. so now.. make your own.. add O ring/gaskets around the cables..

By the way you have a week between races on the weekend to prep for the next one..




....

Last edited by fietsbob; 01-22-18 at 01:47 PM.
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Old 01-22-18, 01:54 PM
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I have a frame that has just an extra braze-on boss for one of those reversing pulleys. Actually, one bike uses it, and I never think about it, although cable routing seems to be best if I give the cable a twist when going around the pulley. It still works fine.

However, the CX70 is also a top-pull derailleur which is worth considering. No need for the reversing pulley.
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Old 01-22-18, 05:21 PM
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To address the second part of your question, top or bottom pull should be invisible to your shifter.
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Old 01-22-18, 10:45 PM
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Thanks for the replies. I did some research and found a "Sturmey Archer Shift Cable Pulley" on Amazon. Would this work for what I need? And also to reply the comment about discerning whether it is top or bottom pull; it is generally mentioned on the manual and generally, road front derailleurs (sti shifters and derailleurs) are exclusively bottom pull.
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Old 01-22-18, 10:59 PM
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the answer is one chainring.
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Old 01-22-18, 11:04 PM
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Originally Posted by superdex View Post
the answer is one chainring.
Considered but a double set-up adds versatility.
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Old 01-22-18, 11:26 PM
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Don't bother with a clunky pulley
just buy a different derailer.
Plenty of Shimano's offerings come in top/down/multi pull variants for the same derailer cage.
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Old 01-22-18, 11:29 PM
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Originally Posted by xenologer View Post
Don't bother with a clunky pulley
just buy a different derailer.
+1

FD is a cheap part.
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Old 01-22-18, 11:43 PM
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Originally Posted by xenologer View Post
Don't bother with a clunky pulley
just buy a different derailer.
Plenty of Shimano's offerings come in top/down/multi pull variants for the same derailer cage.
MTB derailleurs may or may not work on a Cross bike. Some of them are pretty bulky, and could extend too far behind the seat tube.

However, the CX70 derailleur should work... or at least would be worth trying.
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Old 01-23-18, 09:54 AM
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My first cross bike I made my own with a grooved plastic disc from the hardware store and a bottle cage bolt. Worked fine. I “upgraded” to a real one with a cover on it. They’re not that clunky and gunk isn’t really an issue, by the time you get enough mud and gunk on that part, your FD, RD and everything else is covered too. I’ve never given the piece a second thought. As long as the bolt fitting is on there, just buy the part ($10 maybe?) , install, and ride.
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Old 01-23-18, 10:57 AM
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Originally Posted by bikingdude View Post
Considered but a double set-up adds versatility.
more than one bike will too.. bike swaps mid race is allowed in CX..



IDK what your course terrain is .. some course's sections and conditions, running is faster than gearing down..

and shortest lap time, done repeatedly , wins..







...
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Old 01-23-18, 11:07 AM
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Originally Posted by CliffordK View Post
MTB derailleurs may or may not work on a Cross bike. Some of them are pretty bulky, and could extend too far behind the seat tube.

However, the CX70 derailleur should work... or at least would be worth trying.
I know folks who would cut a throat for a top-pull CX70. Fantastic derailleur, in my experience. (PS it even works with Campy shifters, even though they'll swear up and down that it won't.)
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Old 01-23-18, 12:22 PM
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Originally Posted by bikingdude View Post
Considered but a double set-up adds versatility.
tell me more? more versatility during a race? during a ride out in the countryside? What's the goal of the project?
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Old 01-23-18, 12:23 PM
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Originally Posted by ksryder View Post
I know folks who would cut a throat for a top-pull CX70. Fantastic derailleur, in my experience. (PS it even works with Campy shifters, even though they'll swear up and down that it won't.)
Shimano Ultegra CX70 2x10sp Band On Front Mech | Chain Reaction Cycles

?
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Old 01-23-18, 12:42 PM
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Hyperbole. People like them, is what I was getting at.
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Old 01-23-18, 12:49 PM
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Originally Posted by ksryder View Post
Hyperbole. People like them, is what I was getting at.
made it sound like they were hard to obtain, so I was curious
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Old 01-26-18, 09:22 AM
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I run the Problem Solvers pulley on my Macho Man with a 5800 FD. Absolutely no issues and shifts great.
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