Dura Ace R9100
Discussion
http://road.cc/content/tech-news/195350-new-shiman...
Synchronised Shifting as described in para 1 sounds awesome... one button, two movements?
One rear mech for all cassettes too, although I wasnt wholly dismissive of electronic groupsets when they first appeared, I do remember implying they seemed to be the solution for a problem no one had but the jump in technology over the last 18 months or so is just staggering.
Synchronised Shifting as described in para 1 sounds awesome... one button, two movements?
One rear mech for all cassettes too, although I wasnt wholly dismissive of electronic groupsets when they first appeared, I do remember implying they seemed to be the solution for a problem no one had but the jump in technology over the last 18 months or so is just staggering.
pablo said:
http://road.cc/content/tech-news/195350-new-shiman...
Synchronised Shifting as described in para 1 sounds awesome... one button, two movements?
One rear mech for all cassettes too, although I wasnt wholly dismissive of electronic groupsets when they first appeared, I do remember implying they seemed to be the solution for a problem no one had but the jump in technology over the last 18 months or so is just staggering.
That does indeed sound awesome and really increases the appeal of electronic shifting once it trickles down the range.Synchronised Shifting as described in para 1 sounds awesome... one button, two movements?
One rear mech for all cassettes too, although I wasnt wholly dismissive of electronic groupsets when they first appeared, I do remember implying they seemed to be the solution for a problem no one had but the jump in technology over the last 18 months or so is just staggering.
alfabadass said:
9100 is Di2 only?
Disappointed there is still no 11-32 option. Still running a 6800 rear mech on my DA9000 set up...
No, there is a mechanical option, Disappointed there is still no 11-32 option. Still running a 6800 rear mech on my DA9000 set up...
Good wright up here as you would expect.
http://www.dcrainmaker.com/2016/06/shimano-dura-ac...
Hmmm, maybe i have read it wrong. I thought the article was implying that were you in the large chainring and the largest sprocket, if you shifted up on the right lever to find another sprocket (that obviously isnt there) it would change your front mech down to the small chain ring and then the rear mech down a few sprockets to find the equivilant ratio?
eTap Sram shifters cant do this can they?
eTap Sram shifters cant do this can they?
pablo said:
Hmmm, maybe i have read it wrong. I thought the article was implying that were you in the large chainring and the largest sprocket, if you shifted up on the right lever to find another sprocket (that obviously isnt there) it would change your front mech down to the small chain ring and then the rear mech down a few sprockets to find the equivilant ratio?
eTap Sram shifters cant do this can they?
I don't believe so - the Red 22 I have are one paddle controlling each direction and not one paddle overall. Sounds bloody clever stuff and would be interested to see it in action. eTap Sram shifters cant do this can they?
I thought I read somewhere this morning that the "stroke" of the mechanical shifters was different. Wasn't sure this referred to feel or the amount of cable pulled? Surely they won't have changed the ratio of cable pulled to distance the rear mech moves, otherwise you could only use those new shifters with the new rear mech (which does all Dura Ace ratios).
I haven't done the calculations, but isn't there overlap between the big ring-big ring and small ring, small ring? In theory, it sounds awesome, think I'd need to see what it was like in reality though, there are some occasions where I like having control over whether I stay in the big ring at the front or not.
I expect that as they now have a power meter built into the crankset there will soon be some software which will take into account previous performance and based upon gradient of road and how the rider performed then it will select the most appropriate gear; that is the bike will choose the correct gear to suit the physiology of the rider thus optimising cadence and gear/speed.
This will take into account fatigue during the ride (this will compare previous performance) against historical performances. I would expect the bike computer to almost tell you what cadence and gear i.e. speed is best based on FTP. There would need to be some form of race/training mode.
This will take into account fatigue during the ride (this will compare previous performance) against historical performances. I would expect the bike computer to almost tell you what cadence and gear i.e. speed is best based on FTP. There would need to be some form of race/training mode.
ALawson said:
I thought I read somewhere this morning that the "stroke" of the mechanical shifters was different. Wasn't sure this referred to feel or the amount of cable pulled? Surely they won't have changed the ratio of cable pulled to distance the rear mech moves, otherwise you could only use those new shifters with the new rear mech (which does all Dura Ace ratios).
They changed cable pull ratios with the move to 4700, 5800, 6800 and 9000 so I can't see them doing again for 9100?It made 4700 a kind of bespoke 10 speed groupo as you can't mix and match it with any previous gen 10 speed kit.
adamwri said:
pablo said:
Hmmm, maybe i have read it wrong. I thought the article was implying that were you in the large chainring and the largest sprocket, if you shifted up on the right lever to find another sprocket (that obviously isnt there) it would change your front mech down to the small chain ring and then the rear mech down a few sprockets to find the equivilant ratio?
eTap Sram shifters cant do this can they?
I don't believe so - the Red 22 I have are one paddle controlling each direction and not one paddle overall. Sounds bloody clever stuff and would be interested to see it in action. eTap Sram shifters cant do this can they?
Etap (wireless) sram - l lever each side. 1 goes up, 1 goes down (at the back). Hit both together and the front will swap chainrings (there's only two) You still decide the shifts.
new dura ace - full sync mode:
you hit one lever to make it harder, the other easier. Lets say you start in the easiest gear, keep traversing the cassette... at some point* it will automagically swap front chainrings, and jump a big chunk back across the cassette (as a result of 1 tap on 1 lever). You don't choose the front shift.
new, semi-sync mode: You chose a front shift, the rear compensates by moving over a bunch of sprockets at the rear.
- people tend to think in terms of 'when I get to the end of the cassette'. Truth is there's a massive ovelap between the front rings. Small chainring, smallest end of the cassette you could be in the big chainring, near the middle of the cassette, have a better chainline and STILL be in an easier gear. Equally you can be in a harder gear in the small ring than fully crossed up on the big ring.
Edited by upsidedownmark on Thursday 30th June 12:27
ALawson said:
I expect that as they now have a power meter built into the crankset there will soon be some software which will take into account previous performance and based upon gradient of road and how the rider performed then it will select the most appropriate gear; that is the bike will choose the correct gear to suit the physiology of the rider thus optimising cadence and gear/speed.
This will take into account fatigue during the ride (this will compare previous performance) against historical performances. I would expect the bike computer to almost tell you what cadence and gear i.e. speed is best based on FTP. There would need to be some form of race/training mode.
Bloody Playstation generation of cyclistsThis will take into account fatigue during the ride (this will compare previous performance) against historical performances. I would expect the bike computer to almost tell you what cadence and gear i.e. speed is best based on FTP. There would need to be some form of race/training mode.
(Sounds awesome
)Almost like these big race boats, the course is put into a computer which then based upon all sail combinations and wind direction will basically tell you what sails to use, course to sail and when to change direction. You just need to be able to steer the boat and trim the sails properly! Assuming you trust the computer.
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