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PostPosted: Thu Nov 09, 2017 7:26 am 
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Joined: Mon Aug 28, 2017 9:28 am
Posts: 7
So, lets start with the new Tarmac Sworks Disc frame. lets assume it's going to be 750g. Assuming money is not as much of an issue, how can we build this up as light as possible? I'm going to assume Sram Etap, but that's as far as my expertise goes. Thoughts? Mechanical disc brakes?


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PostPosted: Thu Nov 09, 2017 10:19 am 
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Joined: Sun Jul 26, 2015 3:56 pm
Posts: 251
don't use mechanical disc brakes
the weight gain is not worth it

I really doubt the SL6 disc will be under 750 gr ,
even the rim brake frame is quite a bit heavier than announced , except in no paint stealth version

you buy disc brakes cause they are good, mechanical db not so much

The SL6 has a specific seat post , so you can reduce weight maybe with some light hardware for the seat post .
Take light and stiff stem and handlebar

Carbon wheels with flat spokes like cx ray , 6 bolts rotor are lighter , but the best rotor dura aces are only available in center lock , so light center lock hub
Tubular if you want the lighter , Tubeless or good clinchers with latex inner tubs for rolling resistance and comfort .

Light 30 mm crank , the new s works ? Or hollowgram

Carbon saddle

I think that's it ....


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Posted: Thu Nov 09, 2017 10:19 am 


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PostPosted: Thu Nov 09, 2017 10:23 am 
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Joined: Mon Jul 24, 2017 12:02 pm
Posts: 560
It's not going to be 750g. Since people's 56cm Ultralights are coming in at a >780g (and not the 733g claimed,) we can assume that the Ultralight Disc frame will be in the 810-830 range.

A high-end SL6 Disc Ultralight with something like a Berk saddle, shallow clinchers, eTap HRD, all carbon everything, light pedals, etc. could probably get down to 6.6kg before going with really exotic components.


Last edited by TobinHatesYou on Thu Nov 09, 2017 10:54 am, edited 1 time in total.

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PostPosted: Thu Nov 09, 2017 10:27 am 
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Joined: Mon Jul 24, 2017 12:02 pm
Posts: 560
romalor wrote:
I think that's it ....


Lightweight thru-axles are an easy way to lose about 100g or so.


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PostPosted: Thu Nov 09, 2017 10:46 am 
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Joined: Sun Jul 26, 2015 3:56 pm
Posts: 251
Yep !
Forget that !

Carbon ti or shift up at the back
Sram make a light axle for 12 or 15 mm fork , really cheap 40 euros too


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PostPosted: Thu Nov 09, 2017 12:05 pm 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 2519
Location: Vienna Austria
1x mechanical with 3T cassette

Juin Hdyro-mechanical brakes


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PostPosted: Thu Nov 09, 2017 12:18 pm 
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Joined: Sun Jul 26, 2015 3:56 pm
Posts: 251
hydro brake all the way
don't bother with hydro mechanical , mechanical ,

it's stone age technology


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PostPosted: Thu Dec 14, 2017 3:29 pm 
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Joined: Thu Oct 05, 2017 4:21 pm
Posts: 18
Start drilling holes in stuff?


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PostPosted: Thu Dec 14, 2017 6:27 pm 
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Joined: Thu Jan 22, 2015 4:11 pm
Posts: 1391
- 1 chainring only/ no FD

- Lightweight Meileinstein T Disc wheels: 1105g


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PostPosted: Thu Dec 14, 2017 6:30 pm 
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Joined: Fri Jun 03, 2016 5:08 pm
Posts: 1009
+1 to the 1x chainring setup. Get ahead of the curve ;)


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PostPosted: Fri Dec 15, 2017 9:30 am 
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Joined: Tue Aug 12, 2014 3:50 pm
Posts: 1131
Location: FIN
romalor wrote:
hydro brake all the way
don't bother with hydro mechanical , mechanical ,

it's stone age technology
....which is lighter and not spoiled by sticky pistons, fading, bleeding, and unf----nbelivable ugliness of hydro levers. To not mention it's double priced.

to make your life even more complicated, sure go 1x11. Why not ? Why your bike should be light & versatile ? Doesn't has to be. Not at all.

Remember also to choose frame without internal tube for rear brake hose. Then only you can experience full audio feel of disc braked road frame : RATTLING. On every non perfect surface ...what means on every surface :mrgreen:

Don't forget as well to install rotors with cooling fins and pads with "cooling system" - bringing -time to time hot-calipers so close to structurally vital parts of the frame has its consequences... . Choosing hub for your wheels, be aware of possible clearance issues ( brake rotor vs frame ) - in many frames it's so tiny, that rotor is rubbing frame. Specially if both are "light".

I'm sure you're aware of all other unevitable issues with DB o road, so I stop here ;)

_________________
Go to Heaven for the climate, Hell for the company.
Mark Twain


I can be wrong, and have plenty of examples for that ;)


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PostPosted: Fri Dec 15, 2017 9:57 am 
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Joined: Tue Jul 27, 2010 10:04 am
Posts: 726
Yep if you want a lighter bike don't use disc brakes. Can't believe how easily people are led by manufacturers BS!

_________________
Belgian Flag S-Works Tarmac viewtopic.php?f=10&t=144553

"Sometimes you don't need a plan. You just need big balls." Tom Boonen


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PostPosted: Fri Dec 15, 2017 10:01 am 
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Joined: Wed Feb 25, 2009 8:39 pm
Posts: 271
I'd just go with DA9170 except for the crank and the cassette. Go with a light pair of wheels (i.e. Leightweights, Bike Ahead Biturbo), cockpit (i.e. THM/MCFK), and crank (i.e. THM) and you end up with a really nice & pretty light bike. Additionally, you're wallet will be a lot lighter as well :)


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Posted: Fri Dec 15, 2017 10:01 am 


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