I have a fairly new Mondraker Crafty. Up until now, I’ve been riding a lightweight e-bike with the TQ motor. The TQ feels really natural. I don’t at all dislike the Bosch, but I’m really struggling to adapt to the overrun feature. The overrun contributes a lot to the Bosch feeling so much less like a natural mountain biking experience. As I said, I don’t hate it. But im struggling to control it at times.
So my main question is, can I turn I off the overrun feature on some of the modes? Ideally, I would leave it enabled in the most powerful mode, but disable it in the more modest modes which I use most of the time.
On mine you can alter overrun in the app
@tjagain: my flow app only has 4 things you can control. Nd none of them switch off the overrun. So even if I rack back the assistance, torque and dynamics, the overrun still seems to be there. Am I missing something which is different on your app? Mine looks like this:
Ah - I could have sworn I had seen something about overrun but cannot find it now . all I can find now is what you have. I'll have a further look
Sorry.
I found this
Extended Boost (or not)
One of the most impressive features of the latest Bosch Smart System is the Extended Boost. This refers to how much the motor continues to supply power when you have stopped pedalling, which is also known as ‘overrun’.
The Extended Boost function is only found on the latest Smart System-equipped Performance Line CX motors, and it’s only applicable in the adaptive eMTB assist mode. You still get some overrun when riding in the Eco, Tour+ and Turbo settings, but it is not nearly as pronounced.
When using the eMTB mode, the Extended Boost provides consistent motor support for an additional metre of riding when you stop pedalling. As you can imagine, this is hugely beneficial when you’re riding up a steep and technical climb with lots of big ledges to get up and over.
The downside of Extended Boost is that it can feel like the bike is pulling away from you if you’re not ready for it. For example, if you stop pedalling just as you come into a slow-speed corner, the motor will keep driving, potentially pushing you wide and off the trail. We’ve found it fairly easy to adapt to, but lighter and less experienced riders may find it overwhelming.
Those riders have two options. You can simply ride in the Tour+ mode, which still provides adaptive assistance but with less power than the e-MTB mode. The other option is to take your bike into a Bosch dealer to disable the Extended Boost function. To do so, the motor’s maximum torque output will also be reduced to 75Nm. However, that’s likely to be a fine tradeoff for riders who are looking for softer and less aggressive assistance in the first place.
https://flowmountainbike.com/tests/tuning-tips-bosch-smart-system-emtb-review/
Looks like your bike has this feature turne4d up tomax?
@johnhe i've been having the same issue with my Bosch CX equipped Whyte Kado.
It's my first ebike, got it at the beginning of December so trail condition have been far from ideal in the time I've had it.
I've been finding it hard to control the bike on steep slippery climbs, particularly getting over wet roots, due to the overrun.
You can't alter the overrun in the app and details of what each mode offers is very unclear in the info provided by Bosch.
I've now configured it with Emtb+, Sport, Tour+ and Eco+. I've been using it in Sport a lot and it seems more manageable, I have no idea what the actual overrun is compared to Emtb+ and turbo but it "feels" better.
Ah. Maybe I’ll try Sport. My modes sound quite similar. I have EMTB+, EMTB, Tour+ and Eco. But I was using a reduced EMTB instead of your sport. Sport might be a better choice.
Thanks to both of you.
I've been looking at the mode explanation again, I still can't really get my head around the differences.
https://www.bosch-ebike.com/en/products/riding-modes
Bosch recommend Turbo, eMTB+, Tour+ and Eco on full suss MTBs.
Turbo and eMTB+ have a thing called "Dynamic Control", "In steep, bumpy riding situations, you have superior propulsion and on loose or damp surfaces it is like traction control." Can't say I've noticed that working!
Just tried a ride with Sport instead of EMTB. You’re right - there is less overrun. Good tip, thanks.
I HATE, HATE, HATE any overrun. What is the point? I grew up riding non assist bikes and that is how my body is "tuned" to ride. If I want power, I'll be pedalling.
I have a Levo, and assist is supposed to cut out after 0.2 seconds, but if the crank is still moving, even not putting pressure on the chain, the motor keeps going. I find it very annoying, especially on slippery climbs when you have to ghost over slippery roots. Here you back off the power for an instant. The bike is still moving forward, the wheel and cassette are still turning, and so is the crank, but a bit more slowly so there is no tension in the chain, but the ebike sees the crank movement and thinks I still want assist. Annoying.
How overrun became a selling point is beyond me.
Is there not some American guy trying to sue someone claiming the overrun caused him to crash?