That would be great. Otherwise, we would have to bodge something up.He also told me they were studying the possibility to add a chain guide, and they will add the hole in the frame if they validate this
That would be great. Otherwise, we would have to bodge something up.He also told me they were studying the possibility to add a chain guide, and they will add the hole in the frame if they validate this
I've ordered a size L and I'm 185, I'll tell you if it's too short...i've been reading here silently for a while now. thank you all for all the information. i'm wondering if a size large is right for me at 184 cm height.
This would be my first e-bike but by far not my first self-built bike.
Actually, the project should only start slowly next year, but many components are already in delivery.
I still don't understand the different voltages of the motors and the corresponding batteries etc.. What is the standard version now? but I'll take my time with the order anyway.
The fact that the chain guide is still being discussed makes me want to wait even longer.
FYI, I am 183cm and I also ordered L.i've been reading here silently for a while now. thank you all for all the information. i'm wondering if a size large is right for me at 184 cm height.
This would be my first e-bike but by far not my first self-built bike.
Actually, the project should only start slowly next year, but many components are already in delivery.
I still don't understand the different voltages of the motors and the corresponding batteries etc.. What is the standard version now? but I'll take my time with the order anyway.
The fact that the chain guide is still being discussed makes me want to wait even longer.
6/7 weeks ago and already delivered?! It's a size M ?Hi guys, first post here. I ordered my size m about 6/7 weeks ago maybe longer. It's my first build. Could some one tell me what hardwear I need to get. I've ordered Bomber CR Trunnion Shock for it.
View attachment 119942
No, it's not delivered, Jim sent me a picture of it finished. Still waiting for delivery. The motor/ battery is still not ready,was told about 15 days but not sure6/7 weeks ago and already delivered?! It's a size M ?
The custom paint is amazing!
You already have the motor / battery ?
you went for 43V or 36V ? Where did you ordered ? The 43V btf014 should not be ready before 8 of August (according to my seller)No, it's not delivered, Jim sent me a picture of it finished. Still waiting for delivery. The motor/ battery is still not ready,was told about 15 days but not sure
Very nice looking paint job. How much extra was it? 200€?Hi guys, first post here. I ordered my size m about 6/7 weeks ago maybe longer. It's my first build. Could some one tell me what hardwear I need to get. I've ordered Bomber CR Trunnion Shock for it.
View attachment 119942
Hej, do you maybe know, if they will put those holes for the chain guide also in our frames, or only on the future frames?He also told me they were studying the possibility to add a chain guide, and they will add the hole in the frame if they validate this
no idea, apparently they received the bolts and shipping should happen very soon, it's possible that it has already been shipped, so not sure that they will have the chain guidesHej, do you maybe know, if they will put those holes for the chain guide also in our frames, or only on the future frames?
Threw my chain guide away as it was creating problems with sucking in mud and sticks on my M600, fitted a narrow wide front 104 ring and never had a derailment since.so not sure that they will have the chain guides
I should have some spare carbon plates, I need to check that!Internal, if it burns the frame is destroyed either way.
I wrap mind in carbon with Aluminium mounting points, it’s robust probably stronger than a manufactured battery.
6 cells long should be close to the mounting holes, use aluminium flat bar resined to the case, drill and tap holes to suit the frame mounting.
I am starting my battery build soon so will post some photos
Be careful on your choice of cell, you will need probably a 30A minimum capable cell ( 40A would be better ) to handle a 500W loading. At lower cell voltages you may run the risk of the BMS shutting down the battery early if you under estimate this.I’m building my battery pack: 12s1p,
I chose samsung 50s, they should be in stock in 10 days. 5000mAh, 35A ratingBe careful on your choice of cell, you will need probably a 30A minimum capable cell ( 40A would be better ) to handle a 500W loading. At lower cell voltages you may run the risk of the BMS shutting down the battery early if you under estimate this.
they're rated for 35A max, but I do not have the specs for the continuous discharge. The idea is not to climb in turbo mode during 10 km!You may want to check but the 50S we used were only 20A continuous, looking on line some of the dealers are quoting 25A. There are lots of versions though so do check to see what you have.
In the smaller 2P packs we used the 40T version, really good cells and handled 600W’s right to the full discharge of the pack. We found that sometimes it’s better to take a slightly smaller capacity cell but higher C rating for EBikes, the motors draw off can momentarily exceed the cells output and the voltages drop enough to trigger the low voltage on the BMS.
wow, that's scary :/Yep should be interesting for us as I don’t know of any 1P packs being used other than some of the extender packs which normally are used together with the main pack. Do report how you get on as 1P would make a great bottle extender pack to be used as a get me home pack.
Out of curiosity I looked up a few constant current tests on the 5OS and they seem to run very hot at the power levels we would encounter. You can get temperature sensors on some of the BMS’s and it wouldn’t be a bad idea to include some sort of sensing as the 80degrees mentioned would be enough to melt any heatshrink and possibly be hot enough to affect the frame epoxy.
I finally went for 1p instead of 2p because I do not need in the end 2 full size batteries. The price difference was not huge in the end, but I will be able to reuse it as an extender if I can, we'll see.Imo people are getting way too worried about the cell ratings, 50S's are rated officially 25a continuous 35a peak. Unofficially 20a continuous 35a peak due to temps. While I haven't seen any official posts about how much amps the 43v model uses but assuming bafang would want to keep the max wattage comparable to the 36v (they do this with other motors they make) which peaks around 17a we can estimate roughly 14-15a max amps the battery will see. This is well within the spec's of the 50S, and independent testing (mooch) had the cell hit 63c max from a 15a continuous test. Considering on a ebike we usually don't pull max amps for long I don't see any concerns for running a 1p setup other than range. And plus the bms (I hope a bluetooth model) has a temp probe just in case, if bluetooth you can monitor yourself. I personally would maybe look into doing a 2p though with 50E due to the price of 50S in comparison, that way you get more range for almost the same cost but that might not be true where OP lives.
I would go for the in frame mount (the range extender case idea is also good imo), you will have more than enough space with the little amount of cells you will use. Pack the empty space with lots of foam and I see nothing to be concerned about as long as you or the person who makes the pack knows what they are doing and makes sure to spec the series connections for the 15a draw, as common 15x.1mm nickel is not enough, either doubling up on it or copper would be a wise idea. The backpack would be more safe though if you really were worried about a fire, as you should have a battery connection up at the seat so you just quickly unplug and though the backpack far away keeping the bike safe. Not sure why it would be assumed the bike would be a loss if a fire happened
I clearly did not take into consideration the series connection (first battery build).Imo people are getting way too worried about the cell ratings, 50S's are rated officially 25a continuous 35a peak. Unofficially 20a continuous 35a peak due to temps. While I haven't seen any official posts about how much amps the 43v model uses but assuming bafang would want to keep the max wattage comparable to the 36v (they do this with other motors they make) which peaks around 17a we can estimate roughly 14-15a max amps the battery will see. This is well within the spec's of the 50S, and independent testing (mooch) had the cell hit 63c max from a 15a continuous test. Considering on a ebike we usually don't pull max amps for long I don't see any concerns for running a 1p setup other than range. And plus the bms (I hope a bluetooth model) has a temp probe just in case, if bluetooth you can monitor yourself. I personally would maybe look into doing a 2p though with 50E due to the price of 50S in comparison, that way you get more range for almost the same cost but that might not be true where OP lives.
I would go for the in frame mount (the range extender case idea is also good imo), you will have more than enough space with the little amount of cells you will use. Pack the empty space with lots of foam and I see nothing to be concerned about as long as you or the person who makes the pack knows what they are doing and makes sure to spec the series connections for the 15a draw, as common 15x.1mm nickel is not enough, either doubling up on it or copper would be a wise idea. The backpack would be more safe though if you really were worried about a fire, as you should have a battery connection up at the seat so you just quickly unplug and though the backpack far away keeping the bike safe. Not sure why it would be assumed the bike would be a loss if a fire happened
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