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 Post subject: Get me under 15 lbs!
PostPosted: Mon Oct 06, 2014 11:49 pm 
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Joined: Sat Aug 16, 2014 8:40 pm
Posts: 18
I finally got around to do a near complete disassembly and piece-by-piece weighing of my road bike. I came up with 7.6 kg [16.7 lbs] in minimal configuration (no bottle cages, no lights).

Breakdown:

https://docs.google.com/spreadsheets/d/ ... sp=sharing

What would it take to shave off 800 g [1.7 lbs], and how much would it cost? Can I do this without changing the groupset? Are there any obvious low-hanging fruit?

Constraints:

* Don't touch frame, fork, seat post or brakes. I already have a new frame on order. It comes with integrated brakes and a custom seat post. Don't know the weight yet but we can assume that it'll be roughly unchanged. I'll update weights once it gets here (probably later this week).

* Deep section rims are a must. I can go a bit narrower than 50 mm.

* Rear wheel has a power meter hub, so replacing it would cost a lot of money.

* I've already ordered lighter skewers.

* Puncture resistant tires would be highly desired. The ones I have there aren't the lightest, but this bike is not for hanging it on the wall but for riding, so extra weight here is a necessary evil.

* 28T low gear is a firm constraint (I'm already suffering since I switched to 28T from 32T).


Last edited by nameless on Tue Oct 07, 2014 6:48 am, edited 1 time in total.

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 Post subject: Get me under 15 lbs!
Posted: Mon Oct 06, 2014 11:49 pm 


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 1:32 am 
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Joined: Fri Aug 15, 2014 7:27 pm
Posts: 19
saddle: Arione 00 - 140g
headset: extralite, pick one of the 4 that matches - avg. 50g
handlebars: any of the carbons: deda supperleggera, fizik cyrano 00, 3T ergo-etc. LTD, Cinelli Neos, on and on - avg. 190g

those are a few, should save you about 300g for about $1000ish.
if you do warm up to changing the groupset, then well... the stock RED will probably save you 500g at least.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 2:14 am 
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Joined: Fri Feb 28, 2014 1:48 am
Posts: 53
You could always sell the power meter and get a stages. surely the cost would not be too much in the change over ?


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 2:20 am 
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Joined: Wed Oct 23, 2013 9:55 pm
Posts: 38
Pedals: Xpedo Thrust 8 Ti are 170g and relatively inexpensive (they have a weight limit)
Tires: Switch to the regular Continental Sprinters to save 25g per tire. Still nearly bulletproof.
Cassette: Sram XG-1190 11-28 is 167g
Wheels: Lots of choices depending on budget. Should be able to drop quite a bit going to 38mm deep rims.
Cranks: SRAM Red (new style) or Specialized S-Works. Can find used. Combine with lighter chainrings such as Extralite. These together will save around 100g if your existing crank weights are correct.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 2:28 am 
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Joined: Sat Aug 16, 2014 8:40 pm
Posts: 18
RChevalier wrote:
saddle: Arione 00 - 140g
headset: extralite, pick one of the 4 that matches - avg. 50g
handlebars: any of the carbons: deda supperleggera, fizik cyrano 00, 3T ergo-etc. LTD, Cinelli Neos, on and on - avg. 190g

those are a few, should save you about 300g for about $1000ish.
if you do warm up to changing the groupset, then well... the stock RED will probably save you 500g at least.


$3/gram. Ouch.

Groupset wise, I'm sticking to electronic, so, if I were to upgrade, I'd most likely go for Di2 9070. Thought about Campy EPS, but it seems that 9070 is both lighter and cheaper than Super Record EPS, so there's no point. And I can reuse existing wiring and batteries with 9070.

I tried to do the numbers for RED anyways, it looks like the savings are more like 350..400 g. FD: 108 g, RD: 125 g, battery: 70 g, shifters: 32 g, miscellaneous battery mounts and wires: ~90 g, offset by the need to run heavy shifter cables in place of light Di2 wires.

Quote:
You could always sell the power meter and get a stages. surely the cost would not be too much in the change over ?


Stages power meter is not compatible with my current crank arms (it requires an alloy crank arm, there's a list of compatible cranks on the web site, and mine is not in there). It remains to be proven that I gain anything by selling the powertap, getting a lighter hub, getting a heavier crankset, and getting a stages meter.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 3:12 am 
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Joined: Tue Sep 25, 2012 7:08 am
Posts: 71
All relative low hanging fruit in USD.

Used Sram red 11-28 cassette about $70-90 saves 80g
Used or heavily discounted carbon bar, about $90-110, saves 90 grams
Lightweight skewers about $40, saves 70 grams (you got them already)
Ebay KMC x10sl chain about $40 saves 50 grams
Used ebay carbon braided saddle depending on your style (name brand) about $120 saves 90 grams
Deda perforated bar tape $14 saves 44 grams
Super light headset about $70 saves 90 grams

So spend about $500 and save about 500 grams.

Beyond this point, you are going to have diminishing return on money.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 5:25 am 
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Joined: Wed Oct 23, 2013 9:55 pm
Posts: 38
With reference to my previous reply, I forgot that you're using Di2. I'm guessing Extralite rings aren't going to work very well with that front derailleur, and they aren't exactly cheap.
That SL-K crank is quite light - I'd expect it to be a little heavier unless you don't have stock rings.
Is the new frame also BB30?


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 5:47 am 
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Joined: Sat Aug 16, 2014 8:40 pm
Posts: 18
Qman wrote:
With reference to my previous reply, I forgot that you're using Di2. I'm guessing Extralite rings aren't going to work very well with that front derailleur, and they aren't exactly cheap.
That SL-K crank is quite light - I'd expect it to be a little heavier unless you don't have stock rings.
Is the new frame also BB30?


What difference does it make what FD I have, I'd think that a ring is a ring is a ring?

Yes, I took a look at suggested alternate cranks, the weight of SRAM Red crank was quoted by C.C. as 557 g, or only 15 g less than my existing crank. I didn't weigh individual chain rings.

You raise a good point. The new frame is BB86. I had assumed that I could get new bearings or an adapter and I'd be golden. Now looking into this in some more detail, I see that it can't be done. So I'll be getting a new crankset too.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 6:46 am 
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Joined: Mon Jun 02, 2003 8:17 am
Posts: 5871
Location: Drenthe, Holland
Metric weights are much appreciated. Thanks

_________________
Quote:
'Tape was made to wrap your GF's gifts, NOT hold a freakin tire on.'

Quote:
a bit more detail about you - height weight etc,
I am 185cm and about 76kg. I like pina colada's and getting caught in the rain.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 7:10 am 
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Joined: Fri May 25, 2007 6:43 pm
Posts: 2031
nameless wrote:
What difference does it make what FD I have, I'd think that a ring is a ring is a ring?
Electronic front mechs generate very high loads, they don't play nicely with flexy chainrings (the ring moves out of the way) which makes for a messy/slow/noisy shift.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 9:51 am 
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Joined: Tue Jan 14, 2014 1:00 am
Posts: 56
KALLOY UNO "7" AL 7050 stem (80 or 90 mm) will save 20 g for $24 (ebay).
Weigh your seatpost clamp. There are 9 g alu clamps on ebay (Mr. Ride) for under $15.
Hylix has some carbon bars on ebay 180 g for $80.
Generic Chinese carbon saddles (choose design carefully) can be under 100 g for $30, though can take some getting used to since they hardly flex at all.

_________________
6.92 kg CAAD 9


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Tue Oct 07, 2014 10:57 am 
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Joined: Tue Jan 14, 2014 1:00 am
Posts: 56
UCI weight includes bottle cages btw. Which do you have, and what are the bottle cage bolts made of? Aluminium is probably the lightest you can go for a strength/weight savings tradeoff in the cage bolts. Half the weight of Ti and cheap off ebay.

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6.92 kg CAAD 9


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Wed Oct 08, 2014 2:49 am 
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Joined: Tue Oct 04, 2011 5:15 am
Posts: 94
You have cannondale and you want to make your bike lighter, suck it up and buy a hollowgram crankset.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Wed Oct 08, 2014 7:38 am 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 244
Shaving 800g off an already decently light bike (considering the rear hub) is probably more hassle than selling and building a new one, especially when there are no extra-heavy parts and you have to change half the bike for significant gains.

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Carbon is real.


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 Post subject: Re: Get me under 15 lbs!
PostPosted: Wed Oct 08, 2014 8:47 am 
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in the industry

Joined: Sat May 12, 2012 7:25 pm
Posts: 1493
Location: Glermsford, Suffolk U.K
800g will come from swapping out every part for something a bit lighter.
Bars, stem, wheels, tubs, chainset, cassette, cables e.t.c. Easily possible but there is little point unless you want to for a thread.

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www.thecycleclinic.co.uk


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 Post subject: Re: Get me under 15 lbs!
Posted: Wed Oct 08, 2014 8:47 am 


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