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-   -   Can use Shimano FD-6700 with top pull cable? (https://www.bikeforums.net/bicycle-mechanics/1131939-can-use-shimano-fd-6700-top-pull-cable.html)

SEAtrain 12-31-17 09:02 AM

Can use Shimano FD-6700 with top pull cable?
 
I'm replacing a top pull front derailleur on a Cx bike. I purchased a Shimano Ultegra FD-6700; however, when routed the from the top, the cable tightens as the lever moves but the derailleur does not swing.

The top rated comment on the Jenson USA product page says that some guy has used the Ultegra derailleur with both top & bottom pull configurations on his road and cx bike. This makes me believe it's possible but I just don't see how I should route the cable differently than straight in from the top.

Is it my cable routing the problem or have I been misled by the Jenson USA product page?

If it's me then how should I be routing the cable?

Thanks!

Yellowbeard 12-31-17 09:24 AM

If this is the one you bought then yeah, it's bottom-pull and you will need a pulley to reverse the direction of the cable. That top comment seems to be talking about some other derailleur, and then he says that the pictured one "will be considered a 'downswing type' derailleur."

mstateglfr 12-31-17 09:37 AM

I dont see anything on the jenson page that suggests its a top pull FD(because it isnt). Jenson didnt mislead ypu and neither did the comments(based on the linked page in the other response).

Return the 6700fd and get a cx70 which is 10speed specific and top pull.

4 days ago i bought a brand new cx70 fd on ebay for $16.
https://m.ebay.com/itm/Shimano-FD-cx...=1796693795007

Bike Gremlin 12-31-17 09:42 AM

You'd need an adapter like this, if the cable comes from above:

http://www.bike.bikegremlin.com/wp-c...crossclamp.jpg

Link to Problem Solvers site:

https://problemsolversbike.com/produ..._clamp_-_17312

trailangel 12-31-17 10:01 AM

I'm seeing CX-70 in top and bottom pull:
https://www.universalcycles.com/shop...24&category=71

SEAtrain 12-31-17 12:01 PM

Ok. Got it.

It's apparent I didn't read that top Jenson USA comment carefully enough. I think I added words which were not there.

Do any of you know options besides the cx-70? A buddy mentioned one of the local LBS's has had several bikes in with bent cages and cx-70's.

Thanks again.

bradtx 12-31-17 01:03 PM

SEAtrain, Considering where most CX70 FDs are used, I would expect some to be damaged.

You will need either the pulley adapter or the CX70.

Brad

Andrew R Stewart 12-31-17 07:31 PM


Originally Posted by SEAtrain (Post 20081908)
Ok. Got it.

It's apparent I didn't read that top Jenson USA comment carefully enough. I think I added words which were not there.

Do any of you know options besides the cx-70? A buddy mentioned one of the local LBS's has had several bikes in with bent cages and cx-70's.

Thanks again.


CX riding is well known for being hard on equipment and the likelihood of shifting in bad moments (during competition, maybe with your buddy riding up the course and you're not) is great. I would be willing to bet that each of the bent cages reflect the rider and not the equipment. Andy

fietsbob 12-31-17 07:58 PM

In the 80's one bike design ran housing down from above, stopped on the actuating arm ,
and had the cable anchored to the frame at BB..

so housing pushed the derailleur , which moved just like if cable was pulling it down.

HillRider 01-01-18 08:22 AM


Originally Posted by fietsbob (Post 20082742)
In the 80's one bike design ran housing down from above, stopped on the actuating arm ,
and had the cable anchored to the frame at BB..

so housing pushed the derailleur , which moved just like if cable was pulling it down.

My '93 Trek 7000 MTB used that same cable routing/derailleur actuating system.


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