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STI Question...(7 posts)

STI Question...SandiaSS
Jun 17, 2002 3:31 AM
Will a Dura Ace double STI shifter work well with a top pull mountain bike front derailuer running on a double crankset?
I already own the shifters, and am getting a custom Sycip cross bike built. I would prefer top tube cable routing, but if the shifters I own won't work well with a MTB deraileur I'll have the front deraileur cable routed on the downtube so I can use a road unit.
not 100% sure but ...GlowBoy
Jun 18, 2002 12:08 PM
If memory serves, mountain and road front derailleurs require different amounts of cable travel, which would mean you need a road derailleur. Maybe someone else can confirm this.

- Dan
not 100% sure but ...Velocipedio
Jun 18, 2002 12:22 PM
The Bianchi Axis has an LX FD with 105 STI levers, so it seems you can mix'n'match. That is abou the extent of my knowledge on this subject.
not 100% sure but ...The Walrus
Jun 18, 2002 3:08 PM
The Axis does have the 105 STI/LX derailleur combo, but it requires a pretty long throw to go from inner to outer chainring; it's not bad, but noticeably different than with a road derailleur. You can use 105 or Ultegra with a top-routed cable if you're willing to add a pulley. I wanted to use a triple on an Axis and realized I'd have to use a 105 triple front mech, since the 105 levers didn't move enough cable to get an LX to go across 3 rings. Finally came up with a combination of the pulley off a Travel Agent mounted on an E-Clamp (from QBP) and it's worked beautifully. Cost for the parts was about $30, but it was worth it.
re: STI Question...Jakob
Jun 18, 2002 1:04 PM
I don't have the same set up, but mine was sorta similar. I had a pair of Shimano 600 8spd STI on a bike with a bottom pull XT deraileur. It worked just fine. I figure that if it worked with a bottom pull it also would have worked with a top. Of course, this was 8spd and not Dura-Ace, but you still should be okay I think.
I'm using Ultegra shifters with a XT top-pull FDgreg n
Jun 24, 2002 6:55 AM
and it works just fine. You shouldn't have a problem.
was using Ultegra shifters with a XTR and top-pull FDatpjunkie
Jun 25, 2002 12:51 PM
I was using Ultegra STI's with XTR F and R derailleurs. Never had a problem. Switched them out to D/A bar ends as I'm a bit of a Luddite about such things and STI's tend to die horrid and expensive deaths in CX