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front derailleurs: can braze-ons be adapted to fit clamps?(7 posts)

front derailleurs: can braze-ons be adapted to fit clamps?weiwentg
Nov 4, 2001 6:15 AM
my front derailleur is a clamp-on, in a really wierd size: 31.8mm. say i want to upgrade my derailleur (it's a Tiagara and makes horrible grating noises sometimes when it shifts). can i keep the clamp and fit a normal braze-on derailleur to it? i can't seem to find my clamp size in any online store.
re: front derailleurs: can braze-ons be adapted to fit clamps?Rusty Coggs
Nov 4, 2001 6:46 AM
No, but you can buy a braze on adapter clamp and use a brazeon derailer with it. check www.branfordbike.com
re: front derailleurs: can braze-ons be adapted to fit clamps?asdf
Nov 4, 2001 8:32 AM
Any bike shop can order one for you. I got speedgoat.com to order an ultegra front der. for me just a few weeks ago.
re: front derailleurs: can braze-ons be adapted to fit clamps?LC
Nov 4, 2001 9:38 AM
I would first try taking it off and soaking it in a jar a solvent. Take a small brush and get all the dirt out of the pivots. After it dries lubricate the pivots.
re: front derailleurs: can braze-ons be adapted to fit clamps?cyclaholic
Nov 6, 2001 8:27 AM
You are wise to be thinking about upgrading that Tiagra front derailleur. Take it off and get a feel for how heavy it is. That thing weighs a ton.

I have an aluminum bike that had a Tiagra drivetrain. I upgraded every component on that entry level bike and I am very happy with what I have now. It's a completely different bike! Either an Ultegra or Dura-Ace would be a nice very front derailleur and a nice, affordable upgrade.

I don't know metric measurements by memory, but I think you've given a 1 1/4" clamp size. I've seen Ultegra and Dura Ace front derailleurs in that size.

But I won't argue with the advisors who say to get the adapter. That will work. The important thing is to upgrade from Tiagra.
re: front derailleurs: can braze-ons be adapted to fit clamps?weiwentg
Nov 6, 2001 6:15 PM
well... i got a 'generic' adapter from nashbar - a hell of a lot cheaper than a shimano one. i seriously hope it works. now i have to look out for a hot bargain on a derailleur.
is the shifting on a Dura Ace that much better? I not prepared at this point to pay $10 extra (or thereabouts) to save a few grams on a Dura Ace. truth be told I can live with the Tiagara for a bit - although I will certainly be muttering imprecations at it when I shift. thank God my rear derailleur is a 105.
incidentally, can I use a (9-speed) Campy derailleur on my (9-speed) drivetrain?
re: front derailleurs: can braze-ons be adapted to fit clamps?cyclaholic
Nov 7, 2001 7:44 AM
Your adapter ought to work just fine. That's a good way to get around a clamp sizing problem.

As one who has upgraded from a Tiagra front derailleur to a Dura-Ace, I will testify that there is a marked difference in performance. But I would also say, as a person who has two full Ultegra drivetrain bikes, that the difference between Ultegra and DA is very hard to discern for a century rider such as myself. Both give great performance and weigh much less than Tiagra.

I am very aware that upgrading this and that slowly adds up into serious bucks. The reason I upgraded to a DA Front derailleur was because I found the proper clamp size at a very good price ($43). Since you have the adapter, you can probably find an Ultegra FD for around $30. That would be a smart and affordable move.

You are obviously not pleased with the performance of your Tiagra FD. And there is what I would call a significant difference in weight, especially if you move up to DA.

Can you use a Campy derailleur on your drivetrain? I can't say as I've never tried it.