Need FD help please.
dudge
Posts: 59
Hi
I have just built up a 14" Krave Banned framed MTB for my wife using a combination of new and used parts. I used my Sram X7 FD top pull but I am having a slight problem with the cable routing. From the last cable C cup welded to the seatpost down tube to the retaining clamp on the X7 is a very sharp angle and it is causing the cable to rub slightly on the C cup on the frame..it also seems to be putting the whole thing under a lot of tension and I wanted to know if there are more suitable FDs that have the Retaining clamp screws closer to the downtube so that the cable follows the line of the downtube rather than skewing off at an angle...I have XTR standard top pull on my bike but it would cause the same problem due to the position of the clamp..I think a friend of mine has an alivio FD that has the cable clamp behind the seat tube but I was looking for something slightly better as I will be using this bike as well .
Currently it is running SRAM X7 shifters as well, so it would need to be compatable...Anybody know of any FD's that would be suitable or the correct terminology for this type of FD so I can get on and search..Many thanks.
I have just built up a 14" Krave Banned framed MTB for my wife using a combination of new and used parts. I used my Sram X7 FD top pull but I am having a slight problem with the cable routing. From the last cable C cup welded to the seatpost down tube to the retaining clamp on the X7 is a very sharp angle and it is causing the cable to rub slightly on the C cup on the frame..it also seems to be putting the whole thing under a lot of tension and I wanted to know if there are more suitable FDs that have the Retaining clamp screws closer to the downtube so that the cable follows the line of the downtube rather than skewing off at an angle...I have XTR standard top pull on my bike but it would cause the same problem due to the position of the clamp..I think a friend of mine has an alivio FD that has the cable clamp behind the seat tube but I was looking for something slightly better as I will be using this bike as well .
Currently it is running SRAM X7 shifters as well, so it would need to be compatable...Anybody know of any FD's that would be suitable or the correct terminology for this type of FD so I can get on and search..Many thanks.
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Comments
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sounds like that is the way it is. the small frame will not help.
pics to see what it looks like?"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
Will try and get some pics up to show problem. Cheers0
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To try and get another perspective
What do you think?[/img]0 -
Only thing I can think of for that is that it's a high-clamp derailleur, so it's suited to bottom-pull.0
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Deraillieur is either top or bottom pull..it has a clamp availability for bottom pull in exactly the right place to give a straight cable run and if I could route the cable to that fixing point and make it work it would sort out my problem, but the frame is clearly for top pull and it just seems that it is the physical distance from the C clamp to the FD that is causing the problem due to the size of the frame..so if anyone knows of any FD's that have the pull point close to the down tube that would be really helpful. Would a reverse pull work do you think?
Cheers0 -
if it is a problem, i dont really see an issue it works.
get a mech with a low mounting clamp.
there are many out there."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
I could be well off the mark about this, haven't changed front mech in ages. But I think my XT mech can be used top pull or bottom pull, and has a sort of pulley guide for top pull that would put the cable nearer the tube.0
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yeehaamcgee wrote:I could be well off the mark about this, haven't changed front mech in ages. But I think my XT mech can be used top pull or bottom pull, and has a sort of pulley guide for top pull that would put the cable nearer the tube.
not the problem, and the routing is top pull. it is the whole mech that need changing if at all."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
Yep. But the shimano one neatly gets around the problem...not the problem, and the routing is top pull. it is the whole mech that need changing if at all.
XT mech, here we go... (scroll right a bit)
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That Xt looks the job..it would have a much better routing for the cables. Is this standard with all XT FD's or is there a specific technical name for this type?
Oh and I meant to say that mine it isn't working 100% It shifts from the granny to the large ring ok stopping at the middle ring but the cable is very taught and under a lot of tension and then when you release the shifter it bangs straight down to the granny bypassing the middle ring..I have tried all types of adjustment on the shifters and have even tried changing the spacers round on the BB to try and improve the amount of throw that the FD can do, but i do think that it is the angle of pull that is the problem. So any more help always welcome.
Cheers0 -
all mechs have low and high band options. just make sure it is a top pull like your routing (or dual pull)."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
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davewalsh wrote:Shimano refer to this mech as 'Top Swing'. It's available in Deore, SLX & XT.
and most others down the levels. eg FD-M430 and FD-M310"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
Ace
Thanks guys..I will get on to it tomorrow and see what I can find. Many thanks for your help.0 -
Looks like fd M770 (low clamp) will do the trick so thanks to all for your help, much appreciated.0
