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PostPosted: Sun May 11, 2014 1:56 am 
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Joined: Wed Aug 08, 2012 5:54 pm
Posts: 51
This is the starting point for a lightweight build for my fiance. Built the frame to fit her and it ended up being roughly a 51 cm frame. Built up with the best components I could afford at the moment, it still weighs a not too bad 7.68 kg (16.94 lbs) which considering it's a steel custom frame. There's still plenty of room for improvement which will happen a little while down the road when I build the carbon version of this frame for her and start my new job at Praxis (convenient source of parts. . .).

Frame: Custom built 51cm "Petit Souris" steel frame
Fork: ENVE 2.0
Stem: Bontrager Race Lite
Top Cap: FSA
Headset Expander: FSA Compressor Pro
Spacers: None
Headset: Cane Creek 40
Handlebar: Easton EA 70
Shifters: SRAM Red 10 speed
Brakes: SRAM Red
Saddle: S-Works Carbon Toupe
Seatpost: Thompson Elite
Seapost Clamp: Custom Bored Salsa QR
F Derailleur: SRAM Red Yaw
R Derailleur: SRAM REd 10-speed
Cassette: SRAM PG 1070
Crankset: FSA SL-K
Chainrings: Stock FSA
BB: Stock FSA
Pedals: Shimano 105
Chain: SRAM PC1091R
Wheelset: Bontrager Race X-Lite
Tires: Michelin Pro3
Bottle Cage:
Bar Tape: Generic SRAM

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PostPosted: Sun May 11, 2014 3:44 am 
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Joined: Sat Jun 23, 2007 12:41 am
Posts: 1641
I like it...look forward to seeing it painted and finished!

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"It never gets easier, you just go faster..." - Greg Lemond

"I enjoy climbing...I enjoy seeing people disappear behind me." - Robert Millar


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PostPosted: Sun May 11, 2014 4:13 am 
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in the industry

Joined: Fri Dec 07, 2012 8:34 pm
Posts: 280
Location: North Carolina
This thing is a beauty. I love the cable routing through the split top-tube. Very nice work

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The New: BH http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=117760

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PostPosted: Mon May 12, 2014 8:29 am 
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Joined: Wed Mar 28, 2007 12:49 pm
Posts: 1590
Location: Near Horgen, Switzerland
Very nice.

Tell us about the recumbent in the background.


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PostPosted: Mon May 12, 2014 2:28 pm 
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Joined: Mon Feb 19, 2007 3:44 am
Posts: 2060
Location: Canada
Very nice work :beerchug: .

Curious about the weight of the frame...

How would that design be possible with CF ?
Shaping tubes separately, and glueing them after ?

Louis :)


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PostPosted: Mon May 12, 2014 4:00 pm 
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Joined: Wed Aug 08, 2012 5:54 pm
Posts: 51
I am also curious about the weight of the frame. I forgot to weigh it before I built up the bike. I'll be stripping everything off before it goes to paint so I will update with a frame weight then.

As far as how I would make a composite version of this bike, I have two options on how to do that. The first is to do it the way English does and use the steel as lugs and replace tubes with carbon. It's the easier way to do it and will most likely be an intermediate step. The more difficult way of doing it would be to machine some bladder compression molded parts for the frame and then bond them together as is the industry standard. I would have to make some interesting parts in order to keep the twin top tube but I think it would definitely still be possible.

As far as the recumbent in the background goes, that's a weight weenie of a different sort. I'm the team lead of the Human Powered Vehicle team this year at Cal Poly SLO and we built that bike fully out of composites in order to drop the weight from the usual 60-70 pounds that these bikes weigh down to 48 lbs. Not light by diamond frame standards but we still built ourselves a pretty sweet carbon frame for that one. Bladder compression molded joints and the like. The weight of that frame was 2.4 kg which we are planning on dropping lower for next year as we had a fillet brazed steel lug in there instead of all composite which just about doubled the weight of the frame.

If y'all are interested I can post more details in a separate thread. I just figured recumbents wouldn't be of interest to people here.

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PostPosted: Tue May 13, 2014 1:53 am 
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in the industry

Joined: Fri Dec 07, 2012 8:34 pm
Posts: 280
Location: North Carolina
I wish my schools HPV team was that impressive. I think ours died off and I never had a chance to join the club. How'd you guys do in the competition?

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The New: BH http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=117760

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PostPosted: Tue May 13, 2014 10:49 pm 
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Joined: Wed Aug 08, 2012 5:54 pm
Posts: 51
We did moderately well. 3rd in design 7th and 9th in the sprint and 17th in the endurance after we broke our frame. We were still good for a 6th overall though.


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PostPosted: Wed May 14, 2014 12:20 pm 
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Joined: Thu Mar 01, 2012 2:10 am
Posts: 312
I love hi-tech recumbents.


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PostPosted: Wed May 14, 2014 5:09 pm 
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Joined: Wed Feb 02, 2011 3:48 am
Posts: 1438
More of the HPV is cool, especially more detail Re: construction. There's still lots of DIY interest here.

Also, it's still a race bike - not made for a sandal wearing weirdo :lol:


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PostPosted: Thu May 15, 2014 9:16 am 
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Joined: Thu Mar 01, 2012 2:10 am
Posts: 312
jooo wrote:
Also, it's still a race bike - not made for a sandal wearing weirdo :lol:

:lol: Too true!


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PostPosted: Sun May 18, 2014 8:21 pm 
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Joined: Sat Apr 14, 2012 9:35 pm
Posts: 83
interesting - looks like a Haro bmx freestyler.
you could do a frame stand on it ;)


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PostPosted: Wed Jun 11, 2014 6:35 am 
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Joined: Mon Jan 16, 2012 7:03 am
Posts: 202
Location: Queensland Australia
Agreed. That Trike is wicked!!!

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2013 Giant TCR Advanced SL 0, 6.92kg
2013 Giant Defy Composite 2 M, 8.5kg - Wife's
Azzurro Torino 8.55g
Fuji 650 10.8kg
Miele Lupa Triple Tandem 38,89kg


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