bikey850

Either way it's not due until 2020 plus bikes will take a while to filter through the channels.

Hello, looks like there is a 2020 update planned for the CX motor that will reduce friction at cut-off (using a freewheel to decouple the motor from the gearbox). It also appears to use a "normal" size front chainring. Obviously nobody (other than press) have tried it yet so it's hard to say if it's the solution we were hoping for. It would be good if Bosch allowed a trade-in to replace the current CX with the new model (assuming mounting bolts are similarly spaced). I'm guessing there would be no incentive for the bike companies if they were to do this but it would be good to see Bosch continue with their backward compatility and support programmes. The hard thing will be getting hold of the motor and updates necessary if they choose not to do that.

Hi, For those who have been inside the Bosch CX motors or know about how they work in a bit of detail... Is it technically possible to reduce the pedeling resistance from the system by replacing any of ther internal components (gears, bearings, etc) to reduce the losses in the system? Is that where the pedeling resistance comes from? Are there any aftermarket companies who would overhaul the motor but also be able to reduce the pedeling resistance at power cut-off? Is this possible with "better" components or is it simply not possible to modify the system to reduce these without a complete re-design? I am asking as it would be good to send off a motor for overhaul/service and get it back with these improvements. I apprecaite that the waranty would be out the window at this point however a strong third party support network is available for Bosch motors. Many thanks in advance for your thoughts.

Worth letting you bike shop deal with this. Yes there are faults with these motors but they are much fewer than the reports would have you believe. Apprecaite that you are a bit nervous but a few shorter journeys first will let you know if it's a bigger problem or just loose wiring or connectors your dealer can sort out.

Sounds like a break/loose wire rather than a motor fault. Or a loose plug.

Bearing Man, don't give up you are one of the good guys doing the right thing. However a small suggestion is that rather than sell the Bosch stuff just sell generic silicon grease for a slight markup to cover your costs (ie don't make a loss on it). This way we can support you but not have the profits pass down the line to Bosch who are really just selling expensive grease in a tub. Please don't give up ... and I'm hoping your business flourishes as ebikes increase in usage and the need for skilled engineers mean you have plenty of work from folk looking after their bike motors.

What is the grease in the official Bosch kit? "Ebike Drive Unit Grease" it says on the the tube. Is it really just regular silicon grease?

Bearing Man - thank you for you videos - very helpful and explains (I think) many of the issue people have with CX motors going wrong. I expect I will be in touch in approx 18 months when my Bosch warranty runs out! If it goes wrong in the warranty period I can undertand why Bosch just replace the entire motor as many places would not have the engineering experience you have to repair them in the dealer network. In the meantime I will endevour to wash the bike and motor as little as possible in the hope that it helps keep the rust at bay. Thanks again,

I know ... I know... Always wanted a camper van but always thought they go hand in hand with an external petrol generator - something like a Honda EU10i. Honda seem to make a good motor so always though they would be handy to have if touring.

Yoda says ... "Hmmm, think outside the box, you must" Get a 4 amp charger then after a hard days riding pop into a local pub or restaurant and ask them to charge it up for you whilst you relax (only costs them 30 pence). Just leave enough time for a few beers or pudding and pick it up again when settling the bill.

Please be careful before just becoming frustrated and screwing it down further. I tried to do this using Park Tool CWP-7 and only after getting it jammed and then struggling to get it removed did I notice that the top of the puller came away and flipped over to provide a wider "pusher". As the Bosch crank arms are hollow you need to make sure the tool is pushing agains the outer rim of the crank otherwise it just screws into the hollow part. If it doubt please take it to a local bike shop rather than force it which can cause damage. The one shown by soundwave is the alternative type which has a silver part you insert into the crank to allow it to bite. Hope this helps.

New 2019 models are out ... doesn't look like much has changed: https://www.cube.eu/uk/2019/e-bikes/mountainbike/hardtail/reaction/ Bit more integrated for some of the models. Hmmm... not sure I'd like a powertube battery and would still rather stick with the sleakly integrated standard one. Would good be hear some feedback from those who have a powetube model

I have that Leyzne it is pretty good though due to it's small size I keep it for emergency use only and use this which is a great pump and gets most of the use: https://www.topeak.com/global/de/products/floor-pumps/221-joeblow--sport-ii The small pump is very light and takes up no real space in a pannier so it's handy to have on rides.

https://www.lezyne.com/product-hpumps-hp-gaugedrivehp.php Best one I could find that's small, reasonably well built and includes a guage up to 100 PSI.

Highly recommend these - supposed to be for the front but I put them on the back: https://www.ortlieb.com/en/Sport-Roller%20City/ Completely waterproof and well worth the money.