Shimano Ultegra 11 speed

Discuss light weight issues concerning road bikes & parts.
mattr
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Location: The Grim North.

by mattr

Epic-o wrote:You won't get buckling in BB spindles. Axial loads are negligible
Twist a tube enough and it'll buckle.

by Weenie


mattr
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Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

Liggero wrote:Stuff....
It just means that shimano have prioritised different criteria to everyone else. Maybe compatibility with BS standard shells and bearings of XX size is more important to them than some "other" criteria, like using aluminium axles for instance. Or tiny bearings.

And FWIW, its absolutely nothing to do with manufacturing complexity for third party manufacturers, its shimano ploughing their own furrow, and letting everyone else either follow, or not. They've only been doing that for, um, 30 years? They are still the biggest and most profitable company in cycling, so they can do what they want.

And those hollow chain rings? They last for ages and cost next to nothing to produce. Most of the cost is mark up/profit.

bluesea
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Location: Honolulu

by bluesea

mattr wrote:
Epic-o wrote:You won't get buckling in BB spindles. Axial loads are negligible
Twist a tube enough and it'll buckle.



Twist = torsion = shear not buckling.

sigismond0
Posts: 236
Joined: Tue Feb 05, 2013 8:29 pm

by sigismond0

Well that ought to save be a bundle of money on my next bike. Well, that really depends on the color here. If it's that half-assed grey like the previous Ultegra, I'mma avoid it like the plague. If it's black, I'm all over that shit.

maxxevv
Posts: 1949
Joined: Wed Feb 09, 2005 4:51 am

by maxxevv

mattr wrote:
And those hollow chain rings? They last for ages and cost next to nothing to produce. Most of the cost is mark up/profit.


I can assure you, unless you already have the necessary infrastructure in place (aka the right machines ), those rings are not cheap to produce. Neither are they easy to produce.

If it were ... every aftermarket chainring supplier would have followed suite already.

Dennis
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Joined: Sat Nov 06, 2004 1:31 am
Location: Belgium

by Dennis

So no release date for Ultegra? I'm going to buy a new frame. I will probably use my old DA until this is released.

BdaGhisallo
Posts: 1797
Joined: Wed Mar 17, 2004 1:38 pm

by BdaGhisallo

It'll be the usual schedule for Shimano releases. Some will trickle out this Fall but for widespread availability through all sales channels you'll likely have to wait until Spring 2014.

mattr
Posts: 3414
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

maxxevv wrote:I can assure you, unless you already have the necessary infrastructure in place (aka the right machines )
You mean like shimano have since the mid 90s? M950/M952 rings were heavily machined from plate material, it's been coming a looooooong time. (FWIW Campag record chainrings are over 100 quid, and only 10-15 quid less than the last generation D-A rings)
maxxevv wrote:If it were ... every aftermarket chainring supplier would have followed suite already.
Why? Up to now everyone has been following a chainring/crank standard that's been around since jesus was a lad. And everything has been compatible.

From a manufacturing perspective, making one astronomically expensive and relatively specialized set of tooling for the crank (instead of two, 110 and 130 BCD) and then CNCing the chainrings to make up the stiffness shortfall (which is easy and cheap to sub out to third parties) makes perfect sense.
Last edited by mattr on Tue Apr 30, 2013 6:35 am, edited 1 time in total.

mattr
Posts: 3414
Joined: Fri May 25, 2007 6:43 pm
Location: The Grim North.

by mattr

bluesea wrote:Twist = torsion = shear not buckling.
Thin walled tubes tend to buckle, its probably in the definition of a thin walled tube. Probably why shimano are sticking to a thick walled steel tube.

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euan
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Joined: Sat Sep 05, 2009 11:20 am

by euan

"Step forward the climber and all those who worship at the altar of lightness" - R. Millar


FIJIGabe
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Joined: Tue Sep 11, 2012 6:07 pm
Location: The Lone Star State

by FIJIGabe

still no word on availability date, or Di2, but looks like a nice upgrade from 6700.
Madone 9 https://goo.gl/7UwZpV
Crockett https://goo.gl/f5PdCN
Madone 5 https://goo.gl/cMdyFo

Madone 4, Cobia. I own a lot of Treks.

sigismond0
Posts: 236
Joined: Tue Feb 05, 2013 8:29 pm

by sigismond0

Looks very good and I like that they've gone with a glossy metallic grey rather than that ugly flat crap in 6700. I might just have to go buy me some Shimano bits...

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rmerka
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Location: Austin, TX

by rmerka


by Weenie


jamr1
Posts: 31
Joined: Fri Feb 26, 2010 8:03 am

by jamr1

Laurens wrote:
Guerdi wrote:
Image


Love the wireless breaking ;-)


I would rather just get rid of the calipers and go coaster!

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