Shimano Technical Q&A. :)

Discuss light weight issues concerning road bikes & parts.
TheDarkInstall
Posts: 723
Joined: Sun Jan 26, 2014 3:44 am

by TheDarkInstall

If you were able to go the Shimano head office in Japan, for a Q&A session with some of the designers / engineers there, what questions would you want to ask them?

I have my own questions ready, but wondered what else other people might want me to ask...

:mrgreen:

crux
Posts: 86
Joined: Wed Oct 26, 2016 2:20 pm
Location: Zurich, Switzerland

by crux

I would ask why they're specifying (for example) their Dura Ace 9070 RD with a tooth maximum of 28 but it will work fine with 30 & 32...

by Weenie


cdtf
Posts: 90
Joined: Thu Apr 02, 2015 12:08 pm

by cdtf

TheDarkInstall wrote:If you were able to go the Shimano head office in Japan, for a Q&A session with some of the designers / engineers there, what questions would you want to ask them?

I have my own questions ready, but wondered what else other people might want me to ask...

:mrgreen:

Where is synchro shift for Road.

basilic
Posts: 653
Joined: Wed Jan 05, 2011 8:05 am
Location: Geneva, Switzerland

by basilic

- cassettes that start at 12 or even 13, but keep the 16 cog
- flexible cassettes, eg in 3 blocs (11 thru 15 or 12-16, then 16-17-19 or 17-19-21 or... the the upper cluster)
- super compact road cranksets, 46/30 or 44/28 (basically 1x with a bailout granny)

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cyclespeed
Posts: 585
Joined: Mon Jun 06, 2016 8:45 am

by cyclespeed

Why are we having to wait so long for DA Di2 9150?

icenutter
Posts: 87
Joined: Thu Sep 29, 2016 12:45 pm
Location: Newcastle, UK

by icenutter

Why have they brought out powermeters when the market is already saturated?

Do they plan on using more composites? eg cranks, derailleur cages...

Do theyenvisage high end groupsets being di2 only?

mattyNor
Posts: 276
Joined: Wed Mar 19, 2014 3:18 pm

by mattyNor

when will we get a clutch mechanical road derailleur or just have better cross compatibility between road and mtb

trimenc
Posts: 85
Joined: Mon Aug 01, 2016 2:39 am
Location: North Carolina

by trimenc

When will we see wireless Di2? Real WIREless (No wires at all)

uraqt
Posts: 811
Joined: Mon Apr 03, 2006 8:53 am

by uraqt

I ask him about the why they won't replace my new in box 9000 cassette that I know will fail.

C

pdlpsher1
Posts: 1425
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

uraqt wrote:I ask him about the why they won't replace my new in box 9000 cassette that I know will fail.

C


Shimano's answer: that's why we also make the 105 :D

antonioiglesius
Posts: 239
Joined: Sat Oct 15, 2016 9:08 pm

by antonioiglesius

crux wrote:I would ask why they're specifying (for example) their Dura Ace 9070 RD with a tooth maximum of 28 but it will work fine with 30 & 32...


+1

Also I'd like to know what's the one thing they would like to have but is technically impossible to make today.

pdlpsher1
Posts: 1425
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

trimenc wrote:When will we see wireless Di2? Real WIREless (No wires at all)


I could see wireless as beneficial on a MTB where it's more difficult to have internal wiring. But on a road bike I really don't see a need. Nowadays bike manufacturers are including internal mechanical/electronic wire routing options. Once the wires are installed (easily using the magnet tool) the benefits of a wired system outweighs a wireless system.

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jekyll man
Posts: 1334
Joined: Wed Apr 25, 2007 10:23 am
Location: Pack filler

by jekyll man

pdlpsher1 wrote:
trimenc wrote:When will we see wireless Di2? Real WIREless (No wires at all)


I could see wireless as beneficial on a MTB where it's more difficult to have internal wiring. But on a road bike I really don't see a need. Nowadays bike manufacturers are including internal mechanical/electronic wire routing options. Once the wires are installed (easily using the magnet tool) the benefits of a wired system outweighs a wireless system.



Assemble many bikes (as in for a living), and you will see what the true benefits of a wireless system are.
Build time drastically reduced.

Performance benefit? Negligible, but then again i dont see the improvement over mechanical anyway.
Official cafe stop tester

pdlpsher1
Posts: 1425
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

icenutter wrote:Why have they brought out powermeters when the market is already saturated?
Do they plan on using more composites? eg cranks, derailleur cages...


There's a really good article in the German Tour magazine on Shimano. The #1 reason why they stuck to aluminum is cost. In aluminum manufacturing there's almost no human touching the part. Everything is automated whereas carbon is labor intensive. Also with aluminum there's no waste in materials. In Shimano's view aluminum parts (i.e. crank) perform just as well as the carbon counterpart, less the bling factor.

pdlpsher1
Posts: 1425
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

jekyll man wrote:
pdlpsher1 wrote:
trimenc wrote:When will we see wireless Di2? Real WIREless (No wires at all)


I could see wireless as beneficial on a MTB where it's more difficult to have internal wiring. But on a road bike I really don't see a need. Nowadays bike manufacturers are including internal mechanical/electronic wire routing options. Once the wires are installed (easily using the magnet tool) the benefits of a wired system outweighs a wireless system.



Assemble many bikes (as in for a living), and you will see what the true benefits of a wireless system are.
Build time drastically reduced.

Performance benefit? Negligible, but then again i dont see the improvement over mechanical anyway.


It really doesn't take long to route several cables inside a frame. How much time do you save?

by Weenie


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