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XTR Front derailleur tuning VS Dura-Ace

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XTR Front derailleur tuning VS Dura-Ace

Old 04-27-08, 07:25 PM
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bdc88
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XTR Front derailleur tuning VS Dura-Ace

I am currently running a 2 X 9 set up on my XC build and when I started the build I went with the XTR FD-M971. Since I am running top pull, I cut off the bottom pull extra bits and chopped the clamp to cut some additional weight. I have also used an aluminum mounting bolt and an aluminum pinch bolt and nylon adjustment screws to get the weight down from 148g to 134g. All I was able to do was save 14g which does not seem that great. Now I will keep the derailleur incase I want to go back to 3 X 9 set up but I am not thinking that maybe a Dura-Ace FD-7800-B would be a better way to go but this is a bottom pull. I understand that I would need to buy an adaptor to make this into a top pull derailleur but what is the weight of the set up going to be. I would say that it should be under 100g with clamp and adaptor.

I am also running a 68 X 108 BB as the frame allows this set up so the Dura-Ace front derailleur should not be a problem at all.

So any suggestions on this set up. I am maxed out at 134g on the XTR but with a Dura-Ace and adaptor I should be under 100g correct.

Any other suggestions.

I was able to get my XTR rear derailleur down to 154g which was nice since it started at just under 200g

Projected build weight on the XC build is just under 18 lbs.

Last edited by bdc88; 04-28-08 at 11:36 AM.
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Old 04-27-08, 08:52 PM
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I say start drillin' holes, weenie.
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Old 04-27-08, 09:37 PM
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Time for the scary/stupid light stuff.
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Old 04-28-08, 11:15 AM
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Post here and you will get better answer.
Good luck and post some picture later on.

http://weightweenies.starbike.com/fo...wforum.php?f=1
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Old 04-28-08, 11:43 AM
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Already posted there but you never know who has a good answer. Plus I love to see the answers from people who think that light is scary/stupid. Especially when it comes to simple tuning or by maybe looking at something a bit differently to go lighter and better.

I think when running a 2 X 9 set up with a 68 X 108BB it would make better sense to get the Dura-Ace and clamp to lighten up the build and get a derailleur that is intended to run two chainrings instead of using an XTR that was intended to run 3 chainrings.

As for the modifications to the XTR derailleur, there is nothing that was done to hinder the operation of the derailleur. Just some modifications on parts that do not need to be there.
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Old 04-28-08, 07:16 PM
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For an 18# build, the wheels are usually the telling thing as far as scary/stupid light. But, hey, I'm always up for some enlightenment.
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Old 04-28-08, 07:24 PM
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The wheels are going to be some old ones that I had laying around. They are Mavic 517 with Hugi hubs that have been rebadged as Specialized. I had them on my old S-works FSR-XC build (Sub 20 lbs. build). I kept the wheels as they were pretty light at just over 1400g. I have abused these wheels pretty bad in the past and have only had to true them twice in the last 8 years. They are a very solid build for the weight.
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Old 04-28-08, 07:30 PM
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You want light...don't go into it all half-hearted. Go 1x9!
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Old 04-28-08, 10:38 PM
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Originally Posted by chelboed View Post
You want light...don't go into it all half-hearted. Go 1x9!
1x1 !
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Old 04-28-08, 10:42 PM
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Real men ride chain-less ad brakeless.
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Old 04-28-08, 10:58 PM
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bdc88-

1400 gr. is pretty damn light for a XC wheelset, a pound or so less than a lot of 'em at 1800gr.-2000gr. .

It surprises me, too, because the 517's aren't unusually light. Must be the Hugi's ? Tell us the places where you're dropped weight to get sub-20.
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Old 04-29-08, 07:13 AM
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Originally Posted by kenhill3 View Post
1x1 !
13.13 lbs.
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Old 04-29-08, 07:27 AM
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Originally Posted by kenhill3 View Post
bdc88-

1400 gr. is pretty damn light for a XC wheelset, a pound or so less than a lot of 'em at 1800gr.-2000gr. .

It surprises me, too, because the 517's aren't unusually light. Must be the Hugi's ? Tell us the places where you're dropped weight to get sub-20.
The frame is a hardtail so sub 18 is not a big deal as far as I am concerned. My old FSR-XC was just under 20 lbs but is long gone now. So hardtail is what I am now riding.

The objective is sub 18 on a hardtail.

Pedal Force MT, Sid Team, FSA carbon cranks with Extralite 44-30t front rings, Token 11-32 rear, XTR shifters tuned, XTR rear derailleur tuned, KMC X10SL, Eggbeater SL, KCNC Ti Pro Lite post, SLR seat, KCNC skewers, Maxxis Minatour tires, Performance Lunar Lite tubes, Nokons, Easton MonkeyLite SL, Syntace F99 stem with ti bolts, OmniRacer seat post clamp, Token 68 X 108 BB, carbon spacers, Extralite Ultralevers and Vuelta brakes.

The last part that I will decided on will be the front derailleur. If I have a great month at work, I will go with the Parlee clamp, Dura-Ace FD-7700 braze-on because the cage is a bit wider than the FD-7800 cage and the Speen adaptor to convert the derailleur into a top pull. I already have the XTR front derailleur tuned so I can use that for a bit but I can save more by going with the Dura-Ace.

It is a fun project bike to be building up and I hope to do a few Xterra races on the bike. I could go a lot lighter in a few areas but I want it to be a solid build for me which at this time it is.
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Old 04-29-08, 07:32 AM
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13.13 lbs.

Must be the foam grips.
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Old 04-29-08, 07:51 AM
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ESI Silicone grips. The foam grips just do not feel good.
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