Tuned Dura-ace 7900 group.

Discuss light weight issues concerning road bikes & parts.
wally318
Posts: 475
Joined: Fri Feb 21, 2003 1:00 am

by wally318

I've got a bike that I'm rebuilding and wil be taking it from 8 to 10 spd.
So consequently a Shimano 7900 rear derr. is planned with a bit of lightening.
I can figure out what most of the bolts/screws will save but not the pulleys.
Does anyone know what the stock 7900 pulleys/caps weigh? Thanks.
AEROLITUS-defender of the faith

by Weenie


kevosinn
in the industry
Posts: 639
Joined: Mon Mar 05, 2012 7:28 am
Contact:

by kevosinn

they are around 22 grams, the fibre lyte ones save 12 grams
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.

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mec287
Posts: 41
Joined: Thu Dec 20, 2012 10:18 am
Location: West Midlands, UK

by mec287

I love the way your DA rear mech looks - I'm not a big fan of the two tone anodizing on the original, but probably not brave enough myself to do that on mine! Seriously considering the carbon fibre jockey wheels though; thanks for the inspiration on these.
S-works 2012 in Red viewtopic.php?f=10&t=111951" onclick="window.open(this.href);return false;

totoboa
Posts: 88
Joined: Thu Dec 13, 2012 4:24 am
Location: Sierra Foothills, California USA

by totoboa

kevo, do you know the original weight of the front DR ? FWIW the Shimano basement bottom FDR for triple on my Bikes Direct assembly is 110g. It is xtra now, a potential sacrifice victim :beerchug:

Merciful poodle, please be kind here :D Can you please describe the removal operation. Dremel, just lightly shave off exterior areas away from the pivot points ?

My FDR has aluminum upper cammed or moving parts and the ferric guide lower part. My crude guess is that the lower steel part weighs more than the entire upper parts combined. Did you shave the guide shoe on your DA FDR ? It doesn't look like it, or you polished it very well :thumbup:

Wcl4
Posts: 220
Joined: Thu Apr 12, 2012 4:33 am

by Wcl4

Anyone know where to buy BTP parts? I have an email into BTP, but no response so far. Also any good places to buy metric aluminum bolts to replace derailleur ones?


artray wrote:Try here . I had to import mine .Dont cost much ,
http://www.dulight.fr/product_info.php? ... ts_id=1187" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

http://apollocomponents.com/ww2/cat/lis ... =BTP_Parts" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

http://npbikeshop.com/product/btp-bike- ... -11149.htm" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

http://www.b-t-p.de/B-T-P_Team/products ... ifting.htm" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

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