Sep Vanmarcke no likey Di2 @Roubaix

[JStonebarger]

Originally Posted by echappist

more pertinently, Cancellara used mechanical for Flanders and Roubaix

Sagan too, after his Di2 came unplugged in 2015.

[bicycletricycle]

Originally Posted by shinomaster

Racing over cobble stones destroys things and always has.

that is true.

[benb]

Water or dust intrusion into the electronics... bad solder joint or trace on a circuit board that got hit just right, something breaking through a seal in a stepper motor... there are so many things that can go wrong.

No matter what anyone says about their personal experience Di2 is orders and orders of magnitude more complex than mechanical... when you have way more complexity you have way more things that can go wrong. It is a universal truth in engineering, then the issue becomes how do you control that. Electronic groups cost more.. how much of that is cause they put in ever more engineering to solve all the extra new failure cases.

Cables go bad from moisture/dirt/corrosion over time but they don't go bad instantly like electronics can.

[martl]

If you have a foolproof, robust, reliable, simple system that worked for decades, tell people its old fashioned and make it new, more complicated, less reliable, and tell people they want it. Works every f*** time.

[Clean39T]

Originally Posted by shinomaster

Racing over cobble stones destroys things and always has.

Gravel too...well, Type D groad anyway...

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[palincss]

Originally Posted by onetwentyeight

There is a reset button in di2. Push and hold the button on the junction box for 5+ seconds while pedaling till it turns red and flashes. it will then run through a crash recovery mode. The derailleur will cycle through all the gears and re-connect the motor to the cage to restore shifting capabilities.

"Crash recovery" -- are you referring to a software reboot in the event of a software crash, or are you talking about a bicycle crash with physical impact to the drivetrain?

Logically it's more likely that it's the former - hard to see how a reboot could fix actual physical damage to the derailleur mechanism - but I can't recall anyone ever mentioning that electronic shifters suffered from software crashes and the derailleur equivalent of BSOD.

[Mark McM]

Originally Posted by palincss

"Crash recovery" -- are you referring to a software reboot in the event of a software crash, or are you talking about a bicycle crash with physical impact to the drivetrain?

Logically it's more likely that it's the former - hard to see how a reboot could fix actual physical damage to the derailleur mechanism - but I can't recall anyone ever mentioning that electronic shifters suffered from software crashes and the derailleur equivalent of BSOD.

Actually, it's the latter (physical crash):

https://www.artscyclery.com/road/ask...recovery-mode/

[madsciencenow]

The situation totally sucks and maybe for the Roubaix a mechanical drive train is best.

However, I've been on the other side of this where if I had a mechanical set-up I wouldn't have been able to shift due to all the mud (other riders in the same race/ride experienced this). You can argue that I could have gotten off the bike and used a stick or something dislodge the mud but the salient point to me is that there are pros and cons to all gear and it really depends on the situation/preference with regard to what you choose.

What I don't get is when sponsors, riders, and/or teams try to make one solution be the solution. Examples that come to mind are 1x for road racing, apparently tubeless for the Roubaix, etc.

[benb]

I've had a road derailleur jam from mud before too.. but I was able to get it working pretty quickly, quickly enough that he would not have had this result.

[batman1425]

Originally Posted by shoota

I'm just here to see what the Sram haters have to say.

The whole Trek squad was on 1x too (with K-edge keepers).

[John H.]

Hmm? What was Phillip Gilbert riding?

I have DI2 on my gravel bike- Works great in extreme situations.

[Joxster]

A lot of the Di2/EPS bikes will have the connectors taped and then heatshrinked together to stop them 'Popping' during races.

[SpokeValley]

Originally Posted by benb

Water or dust intrusion into the electronics... bad solder joint or trace on a circuit board that got hit just right, something breaking through a seal in a stepper motor... there are so many things that can go wrong.

No matter what anyone says about their personal experience Di2 is orders and orders of magnitude more complex than mechanical... when you have way more complexity you have way more things that can go wrong. It is a universal truth in engineering, then the issue becomes how do you control that. Electronic groups cost more.. how much of that is cause they put in ever more engineering to solve all the extra new failure cases.

Cables go bad from moisture/dirt/corrosion over time but they don't go bad instantly like electronics can.

Slight drift, but a question that came up the other day:

Could one use electrical (or bulb) grease like on a car on the Di2 connections? I just wasn't sure of effectiveness, warranty, etc.

[fried bake]

Originally Posted by shoota

I'm just here to see what the Sram haters have to say.

Ha ha—nice!


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[m_sasso]

Originally Posted by SpokeValley

Slight drift, but a question that came up the other day:

Could one use electrical (or bulb) grease like on a car on the Di2 connections? I just wasn't sure of effectiveness, warranty, etc.

Dielectric grease can also be applied to the parts of virtually any electrical connection that will be exposed to the elements to serve as a sealant that protects the connection from contamination and corrosion.