Ultegra Di2

[richwagmn]

No dropped chains? Check out Schelck's problems at the Tour de Suisse TT ... despite Shimano's "using the wrong 42 for the 54" excuse (makes their Sven Nys pedal episode blame game look almost plausible), the fact that he dropped it on a straight road with no major change in slope (ie., so he wouldn't need to shift gears) and that the chain wouldn't go back on makes the whole issue look like a front derailleur problem to me ...

Shimano's explanation is perfectly plausible. The release/pick up points must be matched for these systems to work (think back cassette cogs).

I think Shimano nailed front shifting with the 7800/6600 groups a few years ago. Starting with these groups, the shifts simply happen like they do on a hyperglide cassette.

Now I've heard the 7900 standard front derailleur/crankset is crazy good (and with a front derailler that isn't trimmable). That would be more than enough for me.

So I don't see how electronic shifting is that much of a help (especially given it's price).

 

[Bustedknuckle]

Shimano's explanation is perfectly plausible. The release/pick up points must be matched for these systems to work (think back cassette cogs).

I think Shimano nailed front shifting with the 7800/6600 groups a few years ago. Starting with these groups, the shifts simply happen like they do on a hyperglide cassette.

Now I've heard the 7900 standard front derailleur/crankset is crazy good (and with a front derailler that isn't trimmable). That would be more than enough for me.

So I don't see how electronic shifting is that much of a help (especially given it's price).

7900 crank and 6700 crank specifically designed with Di2 in mind. VERY stiff(and VERY expensive) big chainrings, required for the Di2 FD to do what it does so well. Di2 works 'ok' with other cranks(installed one with a Quark crank) but 7900/6700 cranks/CRs work really well.

 

[bc_hills]

My mechanical Ultegra shifts great. No complaints there. I do not see how Di2 could improve on that.

Exactly. It feels like technological overkill. For some people, Di2 looks like over engineering and so is unappealing. I guess for others with an unquenchable thirst for the nifty it's the latest, greatest thing going.

If it weren't so expensive, I could see it's benefits in mtb'ing where an average rider can put incredible strain on their drivetrain parts and cables, especially through shifts at the wrong time.

For me, I'd rather be able to tune my own mech (even with the learning curve and frustration involved) than have a battery operated gadget that completely removes me from the equation.

And is it true that you can only shift one cog at a time? So you have to push the button three or four times to make a big shift? Pfft.... back to the drawing board dorks... sounds like Di2 was rushed to market.

 

[Black Dog]

They do not keep the price down. They keep it up. It is the reason why the prices of cycling gear have exploded upward.

This is the reality. Big plus one.

 

[quackattack]

i too agree!

 

[quackattack]

They're still having fun, though. Why do you feel the need to mock them? Jealousy? Low self-esteem? I don't get it

i too agree!

 

[quackattack]

They do not keep the price down. They keep it up. It is the reason why the prices of cycling gear have exploded upward.

i disagree, respectfully of course!