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PostPosted: Sat May 16, 2015 8:21 pm 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 182
Location: san francisco ca. usa
I made this saddle-seatpost combo; it weighs 96.5g. I did a few other things to make the bike lighter: I took 3g off the rear derailleur, 2.5g off the front derailleur, new bb-bearings with full ceramic, new bar-end plugs are now 1.5g for both, I took a little more weight off the crankset, and I made a carbon R-side downtube shift lever.

The total weight is now 7.48lbs or 3,392g. I will give more details about what I did later. The saddle looks a little rough from trimming the sides on these pictures; since then it's smoother. I made the saddle-seatpost combo about five months ago and have about 1300 miles on it with no problems. I think most of you remember I weigh ~138lbs.


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Posted: Sat May 16, 2015 8:21 pm 


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PostPosted: Sat May 16, 2015 8:32 pm 
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Joined: Tue Aug 02, 2011 9:20 pm
Posts: 1381
Location: New Zealand
:faint: Amazing! I'm astounded you have the balls to tune those cranks, truly a piece of art

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2012 BMC SLR 6.02kg http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=110390


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PostPosted: Sat May 16, 2015 10:17 pm 
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Joined: Wed Oct 06, 2004 6:55 pm
Posts: 2007
Location: Vienna, AUT
Donald, just when we think this bike can't get lighter you prove us wrong. Astounding is correct. Keep going, we are watching! :popcorn:
It really still looks amazing.


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PostPosted: Sun May 17, 2015 2:12 am 
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Joined: Fri Mar 18, 2005 4:12 pm
Posts: 2386
Location: eh?
Amazing indeed. But how do those chain rings not just fold up when stand on the pedals - terrifying.

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PostPosted: Sun May 17, 2015 3:00 am 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 182
Location: san francisco ca. usa
Mr. Gibb, I have been using carbon chain rings for about 15 years, some with less material and only once did a small 38 tooth ring crack, standing on the pedals going very hard up an 18 % grade. these rings on my Rue do not have any flex that I can feel. Together they weigh 62 grams, thats, 50 - 34 teeth.


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PostPosted: Sun May 17, 2015 3:34 am 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 182
Location: san francisco ca. usa
I just realized, the weight I said for the two rings is probably the weight for some modified al. rings have. I am not at home where I have the info. on my weights. I will check it tomorrow.


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PostPosted: Sun May 17, 2015 11:49 am 
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Joined: Tue Aug 02, 2011 9:20 pm
Posts: 1381
Location: New Zealand
I can't remember but are they Fiber-Lyte rings that you've dremelled out yourself?

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PostPosted: Sun May 17, 2015 12:08 pm 
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Joined: Sat Apr 22, 2006 12:38 am
Posts: 1801
Location: Dutchess County, NY
Ahh, real WW stuff! So nice to see a Rue frame!

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PostPosted: Sun May 17, 2015 12:38 pm 
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Joined: Tue Jun 24, 2014 8:30 pm
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Awesome build!


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PostPosted: Sun May 17, 2015 1:49 pm 
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Joined: Sun Apr 13, 2014 2:09 am
Posts: 256
Amazing! True weightweenieism! How much does that rear wheel weigh? Surely there is a bit to be lost with a matching carbon rear rim.

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PostPosted: Sun May 17, 2015 3:15 pm 
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in the industry

Joined: Sat May 12, 2012 7:25 pm
Posts: 1858
Location: Glermsford, Suffolk U.K
If i remember right the rear rim is magnesium andweighs less than a shallow carbon rim.

I should really build a light bike this thread is inspiration. I wonder howmlight donald can go with the bike. I wonder what graphene can do when applied to bike parts.

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PostPosted: Sun May 17, 2015 7:16 pm 
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Location: Athens, Greece
Amazing project but the finish of the saddle does not look nice at all. Aesthetics should matter as well IMHO.

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PostPosted: Sun May 17, 2015 7:53 pm 
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Joined: Thu Sep 25, 2003 9:11 pm
Posts: 846
Location: SC, USA
Maybe you already did, but the full ceramic bearings really don't need seals. You likely can take them off and save a gram. Ditto if your dérailleur bearings are full ceramic. Just curious, are these bearings anything special in load rating? I know full ceramics can be low.

Nice to see this bike continues to evolve. Kudos on the upgrades.

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PostPosted: Sun May 17, 2015 8:52 pm 
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Joined: Sun May 10, 2015 6:10 pm
Posts: 10
What is the weight of the bottle cage?
Maybe I will build a lighter one for you! :beerchug:


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Posted: Sun May 17, 2015 8:52 pm 


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PostPosted: Sun May 17, 2015 9:33 pm 
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Joined: Tue Apr 15, 2014 9:49 pm
Posts: 147
Hi Donald. I use a down tube shifter on my front mech. I took out all the bits and bobs and made carbon ones and a very light alloy screw. I'm not sure if that would work on the right side but it saves a few grams over the usual washers and bits etc. I'm using a modolo shifter but on my next build I picked up some old Shimano plastic down-tube shifters they look strong enough to drill out.
I did have a btp shifter but I lost/stolen.

I drilled big holes in the rear cage of my front red mech. I then thought F%%k it and just drilled it all out. It's fine. You could lose at least another gram.

Combo looks great and those drilled out holes in your cranks are insane.
keep up the good work.


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