Road Cycling - differences between band on and braze on

i am a new rider. my nephew got into it with me. i bought a 2004 trek 1000, and he bought an old trek (not sure which model). i was going to upgrade all my sora parts to dura ace, giving all the sora compnents to my nephew, eventually buying a carbon frame and he eventually getting the complete trek 1000. looking through Derailleurs i found band on and braze on. i do not know what either of these are. im hoping someone could tell me what i need, as well as a place to get them at a good price, thanks in advance, Nick

I think that refers to the deraileur shifters, not the actual ders. Braize on parts are made as part of the frame, like the brake posts or water bottle mounts. Band on are put on like the bracket that holds the brake levers on, it can be removed or adjusted up/down, left/right. If I'm wrong, sorry.

thanx that was exactly what i wanted to know

Derailleurs specified with a band have a clamp (band) that is meant to go around the seat-tube. Derailleurs that are specified for braze-ons do not have a clamp. It is assumed the frame has a mounting (used to be brazed/welded on) or tab for the derailleur to attach directly.

Here are two examples of a Shimano Dura-Ace front derailleur. The first has a clamp/band. The second is meant for a braze-on mount.

http://www.bikepro.com/products/front_derailleurs/front_der_jpg/f_da_clamp.jpghttp://www.bikepro.com/products/front_derailleurs/front_der_jpg/ff_da_braze_detail.jpg

It's your money and if you want to do it this way you certainly can, but you might be better served by upgrading to Ultegra to save some $$$ and still have parts worth swapping to a carbon bike later on. The weight/shifting differences are minimal when the cost isn't.

Of course, you could always give the Trek 1000 to the nephew now, buy a new carbon ride fully outfitted the way you want it and justify it to the wife by telling her you're encouraging the nephew no to be sedentary.

PJ

Technically they are the same deralleur. The difference being the clamp. My paramount is braze on and my serotta is clamp on. Lie khuon said the clamp on the frame or not. Personal note is the Dura Ace wears like iron. My DA group is 91, 7400 series and still gong strong. I use the 7400 8 speed levers and deralleur on my Paramount and the 7400 brakes, cranks, BB, Ft derailleur and 01 7700 STI levers and rear derailleur on my serotta

so you guys think im better off with ultegra

For a new rider with a fairly low end frame, I would say Dura Ace is probably overkill.

here's what i'm confused about.....since braze on esentially means "welded on" does a braze on derailleur need to be welded on, or does it simply bolt on to a specific mount integrated into the frame. for example, if i were to get a new frame that took a braze on derailleur, would i be able to bolt on the derailleur, oe would i need to weld it on? thanks

here's what i'm confused about.....since braze on esentially means "welded on" does a braze on derailleur need to be welded on, or does it simply bolt on to a specific mount integrated into the frame. for example, if i were to get a new frame that took a braze on derailleur, would i be able to bolt on the derailleur, oe would i need to weld it on? thanks

The derailleur is bolted onto a tab. The tab itself may be welded or bolted onto the frame.

This is a Dura-Ace braze-on front derailleur as mounted on my bike. Notice the aluminum tab that's bolted into the carbon seat-tube.

http://www.neebu.net/~khuon/albums/bikes_and_equipment/PICT0016.jpg

P.S. Yes I am aware that I really should clean my bike.