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PostPosted: Mon Jun 06, 2016 6:04 pm 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 225
Location: san francisco ca. usa
Finally, after all these years, I took 2 grams off the bottom of the bottom bracket and one gram off the front derailleur hanger, for a frame that now weighs 597 grams. I took more off the crankset, it now weighs 304 grams. The bigger reduction is from my new saddle/seatpost combo. I used my dash saddle with a schmolke post. Total weight 68 grams, and that is with a 300mm long shaft. A light saddle alone weighs that. I have about 1,200 miles on this combo; no problems (I weigh 138lbs @ 5'10'').

For a couple of years now instead of cut inner tubes for hoods I have been using a cut, flexible work glove. Lighter, more flexible ones work best, also the thumb looks better. Just cut the ends to the right shape. They have been very durable. Also I have used thin packing foam with some black "Flex Seal", a liquid rubber coating. One can spray or brush it on the foam. As time wears some of the coating away one can just add more. There are many brands of gloves, one has to find the right ones.

Carbon pad holders with all hardware is 14 grams. I recently took 1 gram off the two rear holders but I have been using these at this weight for over 5 years without problems.

Carbon bar ends, 1.7 grams the pair.
Carbon 10mm wrench for bolt-on skewers, 4.9 grams.


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PostPosted: Mon Jun 06, 2016 7:30 pm 
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Joined: Tue Jan 17, 2012 4:01 pm
Posts: 975
Location: Downtown Los Angeles, CA
Any thoughts on where you want to save weight next?

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Posted: Mon Jun 06, 2016 7:30 pm 


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PostPosted: Mon Jun 06, 2016 7:34 pm 
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Joined: Mon Apr 21, 2014 9:17 pm
Posts: 158
Location: Belo Horizonte, Brazil
Hey, slam that stem and cut the excess steerer... Will save you 10-20g


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PostPosted: Mon Jun 06, 2016 7:45 pm 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 225
Location: san francisco ca. usa
I'd like to have a custom fork made that weights 200g or less. This frame made 9 years ago was specifically made with a very short headtube to save weight and it's a little more aero this way. Making the headtube this short saved more weight than the spacer and extra stearer tube. The spacer weighs practically nothing; would I have a heavy spacer on a bike like this?


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PostPosted: Mon Jun 06, 2016 7:51 pm 
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Joined: Tue May 23, 2006 9:39 pm
Posts: 612
how's the saddle attached to the post? did you bond these together?

way to go Donald. that's a lot of tuning going on.

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PostPosted: Mon Jun 06, 2016 8:26 pm 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 225
Location: san francisco ca. usa
The saddle is attached the same way as my previous combo, the 96g combo [http://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=132517]. I have been using the 96g since 2015 with no problems so I doubt there will be problems with the 68g combo.


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PostPosted: Mon Jun 06, 2016 8:37 pm 
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Joined: Thu Mar 08, 2012 11:43 pm
Posts: 2196
donald wrote:
The spacer weighs practically nothing; would I have a heavy spacer on a bike like this?


Well, yeah. I mean, clearly you haven't thought very much about this build :wink: :lol:

That thing is epic. If you ever retire it from riding duties it shoud be hung up in the Metropolitan Museum of Art.


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PostPosted: Mon Jun 06, 2016 9:37 pm 
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Joined: Tue Apr 15, 2014 9:49 pm
Posts: 1104
Don, can I call you Don "your the man" :lol:
You could cut off the parts of your carbon bar ends that go inside and just glue/bond the flat circular part straight on to your bars . Could save a gram " hopefully"
A gram on your bikes counts .

As usual AWESOME .

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PostPosted: Mon Jun 06, 2016 9:57 pm 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 225
Location: san francisco ca. usa
xena wrote:
You could cut off the parts of your carbon bar ends that go inside and just glue/bond the flat circular part straight on to your bars . Could save a gram " hopefully"
A gram on your bikes counts .


I thought of doing that many years ago but since I change my bar tape every so often and since my bar ends are so light I have always gone with my current setup.

I know you just glue the ends on (on your bike) and I think that's great! You have done some fantastic things to your bikes! Keep it going!


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PostPosted: Mon Jun 06, 2016 10:28 pm 
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Joined: Tue Feb 02, 2010 4:22 pm
Posts: 1030
Location: Brooklyn
Soon your only option will be helium instead of air in the tubes to save weight :-)

Amazing work!


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PostPosted: Mon Jun 06, 2016 11:41 pm 
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Joined: Thu Mar 31, 2016 10:32 am
Posts: 170
donald wrote:
Making the headtube this short saved more weight than the spacer and extra stearer tube. The spacer weighs practically nothing; would I have a heavy spacer on a bike like this?


Wouldn't the steer tube be the same length no matter what the length of the head tube? The spacer just makes up for the shorter head tube. Although with a higher rise stem, you could get rid of the spacer and steerer. It would be a little stiffer in theory too. A more direct line from the supported upper headset to the handlebars.

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PostPosted: Tue Jun 07, 2016 12:21 am 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 225
Location: san francisco ca. usa
Yes, the steerer would be the same length and my stem rises just the right amount now with this spacer. This is the way I decided to go back then and the fit has been perfect. The weight savings is basically just in having an extremely light spacer instead of more head tube. This setup is still very stiff.


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PostPosted: Tue Jun 07, 2016 5:02 am 
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in the industry

Joined: Mon Mar 05, 2012 7:28 am
Posts: 525
Just a great bike and project.....thanks a lot for sharing with us!

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PostPosted: Tue Jun 07, 2016 2:41 pm 
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Joined: Sun May 31, 2009 5:07 am
Posts: 282
Damn Don that bike is awesome!!! You make my 5.2kg bike feel like a pork =(


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Posted: Tue Jun 07, 2016 2:41 pm 


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PostPosted: Thu Jun 09, 2016 12:19 am 
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Joined: Sun Apr 29, 2012 8:32 pm
Posts: 53
Amazing! I love it and I agree you should exhibit at the moma. Could you please also post more pictures of the bike from other angles and details of the tuned parts? Would love to see the full extent of your tunning efforts.


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