Trail braking and error code / beep

[urastus]

I've noticed this a couple of times, and it is always while I'm dragging brake (trail braking) while pedalling. It's usually in technical areas so I just hear the beep but don't see the error. It doesn't matter what the error is because I know what's causing it. Is there any work around for this? I'm kind of surprised that this common technique is not accounted for by shimano.

 

[urastus]

I've given it some thought; I'm guessing it is something to do with the torque sensor. Dragging brake and keeping the torque on (very slow high torque on the pedals).

 

[RickBullotta]

I trail brake quite a bit on my Pivot (E8000) and haven't seen this happening.

 

[Gary]

Why?

 

[RickBullotta]

Why?

Cuz we have a lot of tight and twisty stuff (for me, a slight bit of trail braking help keeps the bike wound up and ready to accelerate out) and cuz I ride a dirt bike too. I trail brake less on my analog bike. My eMTB doesn't accelerate "instantly" so keeping the assist up a bit does help slingshot out of a tight turn.

 

[Gary]

It also fucks up your suspension performance.
but it's your choice.

You honestly think braking helps acceleration out of a turn?

 

[RickBullotta]

It also fucks up your suspension performance.
but it's your choice.

You honestly think braking helps acceleration out of a turn?

Ha. Common sense and the laws of physics say no. ;-)

I just feel like keeping the motor boost a bit wound up helps acceleration out of a turn. A tiny amount of rear brake drag seems to help enable that. I don't trail brake on my Hightower.

But as you know, proper braking technique overall is what'll make you faster and in better control. A guy I know in NZ has done some serious research on the topic and it's a good read. He's developed a product that is kinda like the ShockWiz of braking - and a lot of riders are often surprised by the data and how ineffectively they're braking.

Check it out:

World's 1st Brake Power Meter | Brake Power Meter

Our goal is to answer the age-old questions of how our braking habits affect how quickly we can ride. We’ve been working hard analysing data, creating codes, tweaking algorithms, running stats, engineering, prototyping and riding our bikes so that we can all ride faster and more efficiently. The...

brakepowermeter.com

Cheers.

 

[urastus]

I trail brake quite a bit on my Pivot (E8000) and haven't seen this happening.

That's interesting; so you're still pedalling while you're dragging the brake?

and to answer gary: more control while slow maneuvering.

 

[urastus]

I haven't had that error for a while now - so I think it was fixed with a firmware update, which surprises me . I hadn't updated since I bought the bike - 10 months? There were two updates I think, one for the power button and motor (4.8).