Seattle Forrest

... and that's all I have to say about that.

woodcraft

Like a box of chocolates?

Seattle Forrest

You never know what you're going-to get.

Seattle Forrest

Saw that the other night for the first time in a decade. It held up pretty well.

Cyclist0108

Di2?

Despite being a Di2 fanboy, I never tried it. I guess I am too much of a control freak, and if I want to be in the small chainring with a small gear on the cassette, I would hate to be over-ridden.

Seattle Forrest

There are a few times when you want to shift into the other chainring, but leave the cassette alone. But it's 99.9 % of the time when you want to shift them together. And the Di2 gets all the shifting done faster than I would have. Especially going into the big ring. It mostly feels like a rear shift because the gap in cadence (and time) is so small.

Masque

I just wish they would let you combine semi-synchronized and full sync. When set to full sync, why does shifting the front derailleur not have the option of adjusting the rear as it does when set to semi?

Grr, and stuff.

vze23c3q

Not a fan of semi (based on front shift.) I often drop to the small chainring at stops and don't necessarily want to change the rear.

I really like full (based on rear shifting) to prevent excessive cross chaining. You lose nothing in terms of control with full. If you want to use the left shifter, do so. But you can do an entire ride with just the right shifter. With D-Fly, the Garmin will chirp when the next shift will change the front, a nice touch!

If I want to do a manual front shift, I generally touch the same L & R paddles to minimize the cadence change.

Masque

How did you activate this? Which Garmin?

MikeOK

Please explain the difference between semi synchronous and synchronous.

Masque

Full sync: Automated shifting of front derailleur at pre-determined shift points. This gives you the same effect (roughly) as a 1x system, so you need only shift the rear. In practice, when shifting to harder gears this is essentially transparent, however when shifting to easier gears the front mech transition can be a bit of a surprise.

Semi sync: When the front derailleur is shifted, the rear mech is automatically shifted up or down 2 or 3 gears to compensate and provide a smoother transition.

vze23c3q

I have the 520. You get the shift notification (also when you shift to the last gear), battery display, current gears, shift count summary and probably some others I haven't discovered. Then you can upload your ride to di2stats.com and see all kinds of neat graphs and stats if you're into that kind of thing.

rpenmanparker 

What could be a higher level of control than to be in the exact gear ratio you want?

Marcus_Ti

Would be nice if Shimano allowed you to increase the shift speed of synchronized shifts like they allow single- and multi-shifts....


Otherwise, yup it is neat. Basically the Di2 Shimano equivalent of the Campagnolo simultaneous gear-dump.

Seattle Forrest

@Marcus_Ti

At your advice I installed the E-Tube Project and adjusted the shift speed. "Faster" is about what I'm used to from Ultegra/Force mechanical. Thanks for reminding me to do that, there goes the drawback I saw in the system.

Cyclist0108

If I changed from the default gearing (46/30T in the front, and one wheelset now has 11-36T in the cassette, and the other has the default 11-32T), would synchronous shifting get messed up (i.e., does the software assume I have one of the standard-issue options)?

Marcus_Ti

Your shifting works now doesn't it? The 46/30 cranks aren't something that E-Tube even recognizes as a valid config.

Do it, it should be fine.

Cyclist0108

Nor does it recognize the SRAM 11-36T cassette, I would think.

Maybe I am unclear on the concept. I thought the idea was predicated on having standard Shimano cassettes and chainrings. Can you instead manually program the individual steps for any arbitrary set of gears?

Edit: Upon RTFM: