Are pre-STI front derailers STI compatible?
#1
cycles per second
Thread Starter
Join Date: Oct 2003
Location: Minnesota
Posts: 1,930
Bikes: Early 1980's Ishiwata 022 steel sport/touring, 1986 Vitus 979, 1988 DiamondBack Apex, 1997 Softride PowerWing 700, 2001 Trek OCLV 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 71 Times
in
48 Posts
Are pre-STI front derailers STI compatible?
I have an old bike from the late-80's with Shimano 600 7-speed indexed downtube shifters. Can an STI shifter work with the front derailer (double)?
#2
The Rabbi
Join Date: Apr 2004
Posts: 5,123
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 16 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
Nope... it will work on the rear though. I have a 9spd Tiagra STI on my 8spd 600. Dont ask why but it hits all 9 gears. One of the guys I worked with turned me on to this... not sure if all the 600's were capable of 9 though.
#3
Evil Genius
Join Date: May 2004
Location: Sumner, WA
Posts: 1,529
Bikes: '92 novara ponderosa, '74 schwinn le tour, Novara fusion, novara transfer, novara randonee(2), novara careema pro, novara bonita(2).
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Why would do you want sti on a double front, if I may ask? Just set the high and low stops on the derailer an thats it, just flip the friction shift lever all the way, one way or the other, boda boom shift complete.
#4
cycles per second
Thread Starter
Join Date: Oct 2003
Location: Minnesota
Posts: 1,930
Bikes: Early 1980's Ishiwata 022 steel sport/touring, 1986 Vitus 979, 1988 DiamondBack Apex, 1997 Softride PowerWing 700, 2001 Trek OCLV 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 71 Times
in
48 Posts
Originally Posted by capsicum
Why would do you want sti on a double front, if I may ask?
#5
Queen of France
Join Date: Sep 2004
Location: San Diego, CA
Posts: 3,799
Bikes: Look 565, Trek 2120
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Shimano 8sp STI is compatible with Shimano 7sp, at least for the rear. Sora is the only 8sp group still in production, but you can pick up older Ultegra or 105 levers on eBay. But since STIs do develop slop over time, you may be better off with Sora.
The question in my mind would be why your rear isn't indexing well now. Indexed downtube shifters are dead simple and don't wear out easily. If the shifter itself is still giving you positive clicks, the problem is more likely in the adjustment, the cable, and possibly the rear derailleur.
The question in my mind would be why your rear isn't indexing well now. Indexed downtube shifters are dead simple and don't wear out easily. If the shifter itself is still giving you positive clicks, the problem is more likely in the adjustment, the cable, and possibly the rear derailleur.
#6
cycles per second
Thread Starter
Join Date: Oct 2003
Location: Minnesota
Posts: 1,930
Bikes: Early 1980's Ishiwata 022 steel sport/touring, 1986 Vitus 979, 1988 DiamondBack Apex, 1997 Softride PowerWing 700, 2001 Trek OCLV 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 71 Times
in
48 Posts
Originally Posted by Indolent58
If the shifter itself is still giving you positive clicks...
I googled this and found that pre-STI FDs may work OK with an alternate cable attachment...
"This isn't a DA-vs-Ultegra incompatibility issue; rather the
FD-6400 derailleur predates STI levers. When STI appeared,
they made new front derailleurs with a shorter arm so that
the der moves farther for a given cable pull.
Peter's suggestion of clamping the cable on the side of the
clamp bolt nearer the pivot shortens the lever arm and should
work. I even got an STI triple to work this way, though it was
a bit marginal and had more cable rub than is desirable"
#7
Evil Genius
Join Date: May 2004
Location: Sumner, WA
Posts: 1,529
Bikes: '92 novara ponderosa, '74 schwinn le tour, Novara fusion, novara transfer, novara randonee(2), novara careema pro, novara bonita(2).
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Just switch the rear if thats what you want. Don't worry about the front, or just get a friction lever for the front if the index is worn out. Heck even pro racers use STI rear, with a friction front.(Armstrong for example).
You may be able to put a 9 speed cassette on that hub, I don't think they are any wider, then you really have options. I know 8 and 9 speed mtb cassettes are the same width but not sure on road.
You may be able to put a 9 speed cassette on that hub, I don't think they are any wider, then you really have options. I know 8 and 9 speed mtb cassettes are the same width but not sure on road.
#8
Senior Member
Join Date: Jan 2004
Posts: 9,428
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
Originally Posted by Gonzo Bob
It's not. Most of the time it still settles into gear. But it's slowly getting worse and eventually it will probably fail.
I googled this and found that pre-STI FDs may work OK with an alternate cable attachment...
"This isn't a DA-vs-Ultegra incompatibility issue; rather the
FD-6400 derailleur predates STI levers. When STI appeared,
they made new front derailleurs with a shorter arm so that
the der moves farther for a given cable pull.
Peter's suggestion of clamping the cable on the side of the
clamp bolt nearer the pivot shortens the lever arm and should
work. I even got an STI triple to work this way, though it was
a bit marginal and had more cable rub than is desirable"
I googled this and found that pre-STI FDs may work OK with an alternate cable attachment...
"This isn't a DA-vs-Ultegra incompatibility issue; rather the
FD-6400 derailleur predates STI levers. When STI appeared,
they made new front derailleurs with a shorter arm so that
the der moves farther for a given cable pull.
Peter's suggestion of clamping the cable on the side of the
clamp bolt nearer the pivot shortens the lever arm and should
work. I even got an STI triple to work this way, though it was
a bit marginal and had more cable rub than is desirable"