Picking the right front derailleur
10-24-06, 12:18 PM
#1
BloomBikeShop.com
Thread Starter
Picking the right front derailleur
Right now I'm switching my make-shift double setup into a real double, and I want to be sure I'm getting the right front derailleur.
The bike is a 2004 Trek 1500 with a Tiagra triple front derailleur (top swing, bottom pull.)
I'm assuming this would work?
https://www.pricepoint.com/detail/112...lleur-6500.htm
It looks right, but the only measurement is the 1 1/8" clamp-on size. I'm assuming that is right, too, since my seat tube looks pretty normal.
Just found this one, looks like the same specs:
https://www.nashbar.com/profile.cfm?c...t%20Derailleur
Thanks in advance
The bike is a 2004 Trek 1500 with a Tiagra triple front derailleur (top swing, bottom pull.)
I'm assuming this would work?
https://www.pricepoint.com/detail/112...lleur-6500.htm
It looks right, but the only measurement is the 1 1/8" clamp-on size. I'm assuming that is right, too, since my seat tube looks pretty normal.
Just found this one, looks like the same specs:
https://www.nashbar.com/profile.cfm?c...t%20Derailleur
Thanks in advance
10-24-06, 12:44 PM
#3
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
The 6500 is a 9-speed double derailleur designed to run with 53/39 chainrings but is tolerant to wide variations.
Al
Al
10-24-06, 12:51 PM
#4
Gone, but not forgotten
Join Date: Jul 2002
Location: Newtonville, Massachusetts
Posts: 2,301
Bikes: See: https://sheldonbrown.org/bicycles
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Likes: 0
Liked 6 Times
in
5 Posts
Originally Posted by BloomBikeShop
Right now I'm switching my make-shift double setup into a real double, and I want to be sure I'm getting the right front derailleur.
The bike is a 2004 Trek 1500 with a Tiagra triple front derailleur
The bike is a 2004 Trek 1500 with a Tiagra triple front derailleur
The derailer you have now should work as well as anything.
Sheldon "Save Your Money" Brown
10-25-06, 01:47 PM
#5
BloomBikeShop.com
Thread Starter
Originally Posted by Sheldon Brown
What do you expect to accomplish by swapping out the front derailer?
The derailer you have now should work as well as anything.
Sheldon "Save Your Money" Brown
The derailer you have now should work as well as anything.
Sheldon "Save Your Money" Brown
Wouldn't a double front derailleur work better for a double crankset?
10-25-06, 02:13 PM
#6
BloomBikeShop.com
Thread Starter
But my main concern was getting the right size for my seat tube...
My post is a 27.2 but my seattube gets a tad bigger as it goes towards the BB, so I'm not sure whether it would be 28.6 or 31.8.
Anyone know for sure, or know which bikes generally have which size seat tube?
My post is a 27.2 but my seattube gets a tad bigger as it goes towards the BB, so I'm not sure whether it would be 28.6 or 31.8.
Anyone know for sure, or know which bikes generally have which size seat tube?
10-25-06, 02:46 PM
#7
BloomBikeShop.com
Thread Starter
Luckily I just checked inside my front derailleur clamp - it's a freakin 34.9!
This will be a fun replacement to find...
This will be a fun replacement to find...
10-25-06, 03:53 PM
#8
Gone, but not forgotten
Join Date: Jul 2002
Location: Newtonville, Massachusetts
Posts: 2,301
Bikes: See: https://sheldonbrown.org/bicycles
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Likes: 0
Liked 6 Times
in
5 Posts
[QUOTE=BloomBikeShop]Actually this derailleur sucked even when I had the stock triple on there (ie when it was new!) I could adjust it properly but that adjustment lasted maybe 3 days, so I'm happy to buy a new one [quote]
The Tiagra derailer is just as good quality as the Ultegra, except for being a wee bit heavier because some of the Ultegra's parts are aluminum, instead of steel.
If it doesn't stay in adjustment, that's 'cause something is too loose, has NOTHING to do with the quality of the derailer. If you had mentioned in what way it went out of adjustment, I might be able to guess what is loose.
See: https://sheldonbrown.com/derailer-adjustment
I don't see any reason to think so.
Steel frames are generally 26.8. Aluminum frames commonly have fatter tubes.
If you remove your present front derailer, and look inside of the clamp part that holds it onto the seat tube, you will see the size stamped into the metal.
I still think you're wasting your money to replace this.
Sheldon "If It Ain't Broke..." Brown
[quote]The Tiagra derailer is just as good quality as the Ultegra, except for being a wee bit heavier because some of the Ultegra's parts are aluminum, instead of steel.
If it doesn't stay in adjustment, that's 'cause something is too loose, has NOTHING to do with the quality of the derailer. If you had mentioned in what way it went out of adjustment, I might be able to guess what is loose.
See: https://sheldonbrown.com/derailer-adjustment
Originally Posted by BloomBikeShop
Wouldn't a double front derailleur work better for a double crankset?
Originally Posted by BloomBikeShop
But my main concern was getting the right size for my seat tube...
My post is a 27.2 but my seattube gets a tad bigger as it goes towards the BB, so I'm not sure whether it would be 28.6 or 31.8.
Anyone know for sure, or know which bikes generally have which size seat tube?
My post is a 27.2 but my seattube gets a tad bigger as it goes towards the BB, so I'm not sure whether it would be 28.6 or 31.8.
Anyone know for sure, or know which bikes generally have which size seat tube?
If you remove your present front derailer, and look inside of the clamp part that holds it onto the seat tube, you will see the size stamped into the metal.
I still think you're wasting your money to replace this.
Sheldon "If It Ain't Broke..." Brown
