Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Thu May 26, 2016 9:23 pm
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED

If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 1052 posts ]  Go to page Previous 14 5 6 7 871 Next
Author Message
PostPosted: Fri Aug 29, 2014 2:34 pm 
Offline
Shop Owner

Joined: Sun Jan 03, 2010 4:58 am
Posts: 670
Yeah, between Campagnolo and Shimano, I'm certain it would be difficult to come up with idea that has not been patented.


Top
   
PostPosted: Fri Aug 29, 2014 3:28 pm 
Offline
User avatar

Joined: Thu Nov 10, 2005 5:31 pm
Posts: 3670
Location: Surrey B.C. Canada
Sometimes late to the party is a good idea. Let SHITmano and CampaNOGO sort it all out and then look at what can be done much better and bring it to the market.

_________________
BIG DADDY B FLOW
AERO & LIGHT is RIGHT

Cervelo SLC 5960g/13.13 lbs


Top
   
PostPosted: Mon Sep 01, 2014 4:00 pm 
Offline

Joined: Mon Jan 24, 2011 8:09 pm
Posts: 881
I do like the idea of wireless, and the FD/RD each has it's own battery. Don't know about the lever though to shift? Must have some battery for the transmitter as well. Since I've only charged my Di2 9070 3x times in 9 months, I would assume having to swap the charge cable to the other points a few times a year is a minimal hassle. And not having to deal with running wires inside the frame/fishing them around, etc..eliminates a lot of hassles on setup/maintenance/swapping.


Top
   
PostPosted: Mon Sep 01, 2014 5:07 pm 
Offline

Joined: Tue Sep 20, 2011 12:54 pm
Posts: 395
Location: Haines, AK - Temporarily
The charging cable may be octopus-like and you can charge them all at once.


Top
   
PostPosted: Mon Sep 01, 2014 5:25 pm 
Offline

Joined: Sun Jul 22, 2012 7:17 pm
Posts: 328
The components each have their own removable battery, so it will be a charging dock.


Top
   
PostPosted: Mon Sep 01, 2014 10:49 pm 
Offline

Joined: Fri Feb 17, 2006 6:22 am
Posts: 1352
Location: Zion
For those who are afraid the battery(s) will be dead when they want to ride, how often do,you find your computer battery dead? Sure, it's possible - but, a long shot not to lose sleep over.

_________________
My ~5.7kg / ~12.67lb Addict R1

My ~9.3kg / ~20.5lb Scale 29 Pro


Top
   
PostPosted: Tue Sep 02, 2014 12:59 am 
Offline

Joined: Wed Feb 19, 2014 6:13 am
Posts: 65
I want to know if it will support 1x!


Top
   
PostPosted: Tue Sep 02, 2014 6:48 pm 
Offline

Joined: Sun Mar 01, 2009 5:39 pm
Posts: 101
do you know if Sram will release direct mount brakes for canyon aerod, trek emonda...?


Top
   
PostPosted: Tue Sep 02, 2014 7:04 pm 
Offline

Joined: Tue Sep 11, 2012 6:07 pm
Posts: 1042
Location: The Lone Star State
I don't think they are. They've been testing the new groupset on the Team Bissell Madones using the standard Bontrager brakes (not the new ones), so that leads me to believe that they are not developing direct-mount brakes at this time.

_________________
Trek Crockett, Madone, Superfly, SpeedConcept & Cobia


Top
   
PostPosted: Mon Sep 08, 2014 1:24 am 
Offline

Joined: Wed Apr 09, 2014 2:54 pm
Posts: 12
SinPhi wrote:
This has me wondering if the possible function of a front gear change also changes a few cogs in the rear to do just what you would with a mech group, seems to make sense that it would. I now I change both at the same time for nearly every front shift. Would end up being a sort of hybrid between sequential and manual.


I for one will be very surprised if it doesn't come out with this functionality, at least as a programmable option. Would be easy to do, and with the improved timing and synchronization afforded by electronics it should make for very reliable changes. I run DA9000 mechanical (9001 levers) with a SRAM chain catcher, and tend to hit both levers simultaneously now more often than not when changing rings up front. Never did it in the past, but with this group it's dead-easy, super-smooth and never misses a beat.

Depending on front rings and rear cluster, you'd just program the rear to move 1-3 cogs simultaneously whenever you switch chainrings. And of course if you didn't want it, it would be easy to program it to just swap front rings. Only reason whatsoever for it not to have that capability might be potential patent issues.


Top
   
PostPosted: Mon Sep 08, 2014 1:58 pm 
Offline

Joined: Sat May 09, 2009 3:03 am
Posts: 219
Location: Maryland
I also usually shift both at the same time, so I've been thinking about this. While I don't think tapping both shifters with a quick following tap/s to whichever paddle is needed would be difficult, I think it loses an opportunity.

A system like this should be aware (programmed) of the specific gearing used and know where in that gear combo you are. Therefore, I hope SRAM allow the following:

When shifting up to the big ring, use the gearing info and position to automatically select the appropriate rear cog to give the next hardest gear combination available, whether that be one shift or two, making the step perfectly in sync. Likewise, when dropping to the small ring, choose the appropriate rear cog to give the next easiest combo available. Smooth transitions, done by knowledge of specific gearing inches and position. Should be easy.

Almost all scenarios would be covered by this. The only scenario not covered - dumping or bumping up. If dumping or bumping, just continue tapping the appropriate shifter. Easy peasy.


Top
   
PostPosted: Tue Sep 09, 2014 9:47 am 
Offline
User avatar

Joined: Tue Sep 09, 2014 9:30 am
Posts: 356
JN2Wheels wrote:
A system like this should be aware (programmed) of the specific gearing used and know where in that gear combo you are. Therefore, I hope SRAM allow the following:

When shifting up to the big ring, use the gearing info and position to automatically select the appropriate rear cog to give the next hardest gear combination available, whether that be one shift or two, making the step perfectly in sync. Likewise, when dropping to the small ring, choose the appropriate rear cog to give the next easiest combo available. Smooth transitions, done by knowledge of specific gearing inches and position. Should be easy.

You're basically describing sequential shifting. But, I doubt that this SRAM setup will allow it.

Speculation: I believe the signaling logic is setup such that...

Left lever sends signal L
Right lever sends signal R

RD receives L alone, shift down
RD receives R alone, shift up
RD receives L+R, do nothing

FD receives L alone, do nothing
FD receives R alone, do nothing
FD receives L+R, checks where it is now, and moves to the other position

That is extremely simple circuitry, no junction box needed. But for sequential shifting you need a unit to interpret lever input, store current RD/FD state, and output instructions to the FD/RD. This SRAM setup doesn't appear to have any memory or processing, unless it is all tucked into the hoods (doubtful).


Top
   
PostPosted: Tue Sep 09, 2014 1:07 pm 
Offline

Joined: Sat Oct 31, 2009 7:35 pm
Posts: 110
The question about the SRAM system is without a central processor how does one derailleur know what the other one is doing? For auto trim of the FD or sequential shifting the two derailleurs need to know each other's state. That would imply that the derailleurs need to be able to talk to each other over the wireless link. Either that or there would need to be some smarts in the shifters themselves. Having smart shifters would make remote shifters more difficult so I would guess that any smarts would be in the derailleurs. I don't think it would be very hard for the derailleurs to talk to each other which would make all these features possible. The calculations are not very complicated and wouldn't need much processing power to execute.


Top
   
PostPosted: Tue Sep 09, 2014 1:08 pm 
Offline

Joined: Sat May 09, 2009 3:03 am
Posts: 219
Location: Maryland
Quote:
You're basically describing sequential shifting. But, I doubt that this SRAM setup will allow it.


Yes... But... Only sequential when the rider wants to shift the big ring. The huge problem with full sequential is the loss of control over the big ring shifting as the "computer" decides what is next. My logic eliminates the loss of control, and instead only uses sequential programming when the user decides to shift front chainrings. Seems like a great implementation in my mind.


Top
   
PostPosted: Tue Sep 09, 2014 3:01 pm 
Offline

Joined: Mon Oct 28, 2013 11:08 pm
Posts: 33
kkibbler wrote:
JN2Wheels wrote:
A system like this should be aware (programmed) of the specific gearing used and know where in that gear combo you are. Therefore, I hope SRAM allow the following:

When shifting up to the big ring, use the gearing info and position to automatically select the appropriate rear cog to give the next hardest gear combination available, whether that be one shift or two, making the step perfectly in sync. Likewise, when dropping to the small ring, choose the appropriate rear cog to give the next easiest combo available. Smooth transitions, done by knowledge of specific gearing inches and position. Should be easy.

You're basically describing sequential shifting. But, I doubt that this SRAM setup will allow it.

Speculation: I believe the signaling logic is setup such that...

Left lever sends signal L
Right lever sends signal R

RD receives L alone, shift down
RD receives R alone, shift up
RD receives L+R, do nothing

FD receives L alone, do nothing
FD receives R alone, do nothing
FD receives L+R, checks where it is now, and moves to the other position

That is extremely simple circuitry, no junction box needed. But for sequential shifting you need a unit to interpret lever input, store current RD/FD state, and output instructions to the FD/RD. This SRAM setup doesn't appear to have any memory or processing, unless it is all tucked into the hoods (doubtful).


Yes, this is probably it but I think I'd much prefer the system use the rising edge of the shift buttons for a more responsive and engaging drivetrain. For it to work in your example it would have to use the falling edge for the L+R logic to work.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 1052 posts ]  Go to page Previous 14 5 6 7 871 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Cannondale CAAD 12 has landed.

[ Go to page: 1 2 ]

in Road

davidalone

29

10363

Sat Mar 26, 2016 6:27 am

G19 View the latest post

There are no new unread posts for this topic. Stranded by Electric?

[ Go to page: 1 2 3 ]

in Road

Bridgeman

31

1797

Thu Mar 31, 2016 4:28 pm

Junior7 View the latest post

There are no new unread posts for this topic. SRAM Red 2009 vs SRAM Rival 2014 Weight?

in Road

allenpg

0

898

Sat Jun 27, 2015 6:33 am

allenpg View the latest post

There are no new unread posts for this topic. Do you know when sram e-tap is out?

in Road

oopssk8

8

661

Sun Mar 06, 2016 6:44 am

VTBike View the latest post

There are no new unread posts for this topic. Campag & SRAM mix?

in Road

IamnotWiggins

5

602

Tue Jul 21, 2015 10:07 pm

IamnotWiggins View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: Bing [Bot], Bluechip, CBJ, mpulsiv, PLuKE, wingguy and 19 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited