Dengfu E69 Frame - Bafang M820 (lightweight)

[Waynemarlow]

Available in medium. Best to contact Andy at Carbon Cycles. I simply ordered through Ebay and it turned up about 6 weeks later.

Dengfu 29er Ebike Carbon Frame M820 150mm Frame Travel unassembled frame E69 48V | eBay

Motor BAFANG M820. S/M" ,120mm travel. Lithium-ion 504WH~720Wh. 148x12 mm thru axle. Fit shock size 230X60mm.

www.ebay.co.uk

 

[TommyR]

Bummer. I was under the impression it was more of an enduro frame, but it appears to be XC-biased.

 

[Waynemarlow]

Bummer. I was under the impression it was more of an enduro frame, but it appears to be XC-biased.

I wouldn't be so sure of that, its a really burly and probably over engineered frame. Against my E10 there is not much difference in looks and size. Very Levo esq in shape and size of down tubes and such and I would say its the E82 rear subframe. I think its set up for 160mm rear travel giving you the option of a 170 - 180mm front fork.

I'm somewhat dissapointed that the frame is " burly " looking but for what I bought it for, 500Wh battery with a secondary Lapierrre GLP2 style battery sitting down in the lower section just above the motor for the summer months on dry trails then I'm pretty happy with it.

Just accumulated the last bit's & pieces so should have it built up over the weekend.

 

[TommyR]

I was looking at the travel and thought I saw 120mm listed for the frame. I may have misread.

 

[like-bike]

hello everyone, would it be possible to have more info on the frame? there is not much on the official page. thanks

 

[Waynemarlow]

Nice little frame guys, finally got mine built up after what seemed a forever job, not sure why its taken me so long. Highly recommended to simply buy the appropriate wiring kit / battery that actually fits, it will speed up your build quite a bit. There's a few bits such as the speed sensor and charging port that are specific to the frame.

So with just bits I had laying around, reasonably heavy duty components such as Deore XT or Deore components, Halo wheels with the typical 2.6 Hans Dampf and 2.4 Magic Mary combo, Magura MT7/ MT8 brakes with 220mm and 203mm very basic Shimano discs, 10 speed Shimano 6000 series shifters and derailleur,Manitou fork with some anti puncture sealant, all up 17.2kgs without battery. Quite pleased in a way.

Fitted a 360Wh battery in the water bottle bracket area ( that area is large enough that you can fit a piggyback shock and have a decent size water bottle, one of the few frames you can do that with ) just on 19.4kgs with front mudguard fitted. Feels very light against my E10 which is just under 23kgs.

I haven't ridden it far as its been lashing down with rain here so will come back with some photos and ride feel after the weekend. First comment though is the very upright seat stay cramps the cockpit a bit. I've fitted a wider bar and ordered a slightly longer stem which should solve that nicely.

 

[gido]

Nice little frame guys, finally got mine built up after what seemed a forever job, not sure why its taken me so long. Highly recommended to simply buy the appropriate wiring kit / battery that actually fits, it will speed up your build quite a bit. There's a few bits such as the speed sensor and charging port that are specific to the frame.

So with just bits I had laying around, reasonably heavy duty components such as Deore XT or Deore components, Halo wheels with the typical 2.6 Hans Dampf and 2.4 Magic Mary combo, Magura MT7/ MT8 brakes with 220mm and 203mm very basic Shimano discs, 10 speed Shimano 6000 series shifters and derailleur,Manitou fork with some anti puncture sealant, all up 17.2kgs without battery. Quite pleased in a way.

Fitted a 360Wh battery in the water bottle bracket area ( that area is large enough that you can fit a piggyback shock and have a decent size water bottle, one of the few frames you can do that with ) just on 19.4kgs with front mudguard fitted. Feels very light against my E10 which is just under 23kgs.

I haven't ridden it far as its been lashing down with rain here so will come back with some photos and ride feel after the weekend. First comment though is the very upright seat stay cramps the cockpit a bit. I've fitted a wider bar and ordered a slightly longer stem which should solve that nicely.

Please show pics....

 

[Waynemarlow]

Here's some piccies for you guys.

 

[Waynemarlow]

You will have to excuse the mudguards, we are now into UK autumn / winter mud and slime trails. Last night was the first long ride as such. I need to sort out the suspension a bit, not much actually as the bike climbs really well in muddy conditions and doesn't seem to mind the downhill ( I need to get used to the much more foward seat tube compared to the E10, its much more upright almost like mtb's of the past but with 160mm of suspension ) motor seems to juuuuusssst be able to keep up with the full fats, feels very light on the trail, seems pretty economical on the battery, lots to like.

 

[temon10]

Here's some piccies for you guys.

View attachment 148060 View attachment 148061 View attachment 148062 View attachment 148063 View attachment 148064 View attachment 148065 View attachment 148066 View attachment 148067 View attachment 148068 View attachment 148069 View attachment 148070 View attachment 148071

pls take photo not in direct sun so we can clearly see that fullbike if U dont mind. thx.

 

[Waynemarlow]

Not sure things would change much, it is a glossy frame.

 

[kaaskopf]

can see something e-69 in this no?

 

[LAnton]

A very interesting bike. I really like that you can remove the battery. Please tell us if the battery is easily removable? What is the real stroke of the rear suspension? The supplier tells me 160, then 170mm. How much does a 15A 48V battery weigh? As I was informed, the battery is assembled on 18650 cells

 

[like-bike]

A very interesting bike. I really like that you can remove the battery. Please tell us if the battery is easily removable? What is the real stroke of the rear suspension? The supplier tells me 160, then 170mm. How much does a 15A 48V battery weigh? As I was informed, the battery is assembled on 18650 cells

dengfu's site is not the best, it lacks much information about the frames. as for weight

 

[TommyR]

The listings for this bike are very confusing. I've seen it listed as anywhere from 120mm of rear travel up to 160mm. Very strange...

 

[Freda]

The listings for this bike are very confusing. I've seen it listed as anywhere from 120mm of rear travel up to 160mm. Very strange...

Maybe you are confusing this with the Yishun E868. It looks similar but has more XC geometry and 130mm rear travel.

According to the graph on dengfu site, the E69 has 156mm travel. This also fits with 65mm shock stroke, when leverage ratio is around 2.4 average. It is very linear trough its travel.

 

[Waynemarlow]

A very interesting bike. I really like that you can remove the battery. Please tell us if the battery is easily removable? What is the real stroke of the rear suspension? The supplier tells me 160, then 170mm. How much does a 15A 48V battery weigh? As I was informed, the battery is assembled on 18650 cells

The battery is removeable but not easy like say the Trek where simply with a key you can remove and fit another battery in minutes. You don't need to remove the motor but you do need to remove 4 bolts from the lower cover, remove the cover, remove 2 further bolts to slide the battery down out of the tube. In my view that is not an easy change.

In some ways I predicted this in my tick list of reasons to buy the frame, countering this with the ease of where to put an additional battery in the quite large void area above the motor. Thats seems to be the case and having gone down the route of a 500Wh internal battery and almost any size of external battery, that seems to have worked out.

I think with my 62.5 stroke 230mm length shock there is approx. 160mm rear travel. I say approx. as its quite hard to fully measure the movement whilst on a bike stand.

My biggest complaint at the moment is the motor, man that is one noisy little motor. It seems to be quietening down each ride, but just having re riden my E10 with a M510 motor, its chalk and cheese. I'm not sure but I think I may have gone into overheating mode on the motor, we have a lot of very muddy trails here at the moment and I was using Boost quite a bit on a very long mud and water logged climb for about 10 minutes, the motor reduced itself to about 350W's which was a bit unexpected and painful to say the least. The M510 you can use Boost for any length of time it would seem. Not fully sure of that overheating yet and will need to ride it further to verify that.

Incidentally my batteries are 14S and the motor does'nt seem to mind the voltage ( maybe over 500W's are the limitations of the heat sink of the motor ).

 

[Slaine]

The battery is removeable but not easy like say the Trek where simply with a key you can remove and fit another battery in minutes. You don't need to remove the motor but you do need to remove 4 bolts from the lower cover, remove the cover, remove 2 further bolts to slide the battery down out of the tube. In my view that is not an easy change.

In some ways I predicted this in my tick list of reasons to buy the frame, countering this with the ease of where to put an additional battery in the quite large void area above the motor. Thats seems to be the case and having gone down the route of a 500Wh internal battery and almost any size of external battery, that seems to have worked out.

I think with my 62.5 stroke 230mm length shock there is approx. 160mm rear travel. I say approx. as its quite hard to fully measure the movement whilst on a bike stand.

My biggest complaint at the moment is the motor, man that is one noisy little motor. It seems to be quietening down each ride, but just having re riden my E10 with a M510 motor, its chalk and cheese. I'm not sure but I think I may have gone into overheating mode on the motor, we have a lot of very muddy trails here at the moment and I was using Boost quite a bit on a very long mud and water logged climb for about 10 minutes, the motor reduced itself to about 350W's which was a bit unexpected and painful to say the least. The M510 you can use Boost for any length of time it would seem. Not fully sure of that overheating yet and will need to ride it further to verify that.

Incidentally my batteries are 14S and the motor does'nt seem to mind the voltage ( maybe over 500W's are the limitations of the heat sink of the motor ).

What is the frame category ?
I ask this because if this frame had 160mm travel is it sure I use him for enduro trails?

 

[LAnton]

I've been using a 48V battery with a 43V motor all summer. Very often in boost mode for a very long time. The power has never dropped. The maximum motor power is 650W. I also don't like the noise. And since the warranty on the motor is 3 years, I don't want to open it. Either I'll switch back to the m510 or I'll use the M560. The M560 is driving merrily and the noise becomes inaudible.

 

[like-bike]

I've been using a 48V battery with a 43V motor all summer. Very often in boost mode for a very long time. The power has never dropped. The maximum motor power is 650W. I also don't like the noise. And since the warranty on the motor is 3 years, I don't want to open it. Either I'll switch back to the m510 or I'll use the M560. The M560 is driving merrily and the noise becomes inaudible.

but are the frame mounts the same between the engines? m820, m510 and m600

 

[kaaskopf]

but are the frame mounts the same between the engines? m820, m510 and m600

m500-m510-m560-m600 all has same mounting

m820 is smaller and m620 is bigger

 

[like-bike]

m500-m510-m560-m600 all has same mounting

m820 is smaller and m620 is bigger

ok thank you to much

 

[Waynemarlow]

Had another 50K ride on Sunday, hard to really get anywhere near a knowledgible basis of what the frame is actually about due to the trail conditions. We are in prime mud, slop and slippery roots time of year, this year seem particularly " slippery ". The frame seems really stiff and I think the limitiation at the moment is my suspension. I sort of get the feeling that it will be your suspension and suspension setup knowledge that will be the frames limiting factor.

Seems to ride like the old Mtb's of the past as in you sit up on the bike ( very steep seat tube ) rather than say the E10 where you seem to sit in the bike. I've always ridden Whyte bikes where you feel at one within the bike rather than say other brands where you do feel as though your bike is below you, I am sort of missing that aleady. I'm thinking of going Mullet with it to try and get the seat tube a bit slacker.

Solved the cramped cockpit by fitting a longer stem. Fitted an 80mm stem where previously I had a 30mm and it now feels comparible to my E10.

The motor is quietening down nicely and is already much quieter than it was. Still not sure about the power of the motor though. Set it up via the phone App as I haven't had a chance to put it on the BESST program. Seem to be getting only max about 500W's which with a 52 volt battery I was expecting a tad more, sort of around 600W's. The upside to the lower power is I have to work a lot harder and my little 300Wh batteries I had seem to be good for a couple of hours and 550m of climb. Pretty impressive and my legs are getting fitter.

At this stage I'm really wondering about actually fitting a fixed battery. The little case I have fits the batteries absolutely spot on, it takes about 3 minutes to change them and they work, do I really need to bother ? I think you can get 18650 batteries across the frame, which sort of leads to a 3P 13/14S 18650 battery. thats nearly 550Wh's.

 

[LAnton]

Had another 50K ride on Sunday, hard to really get anywhere near a knowledgible basis of what the frame is actually about due to the trail conditions. We are in prime mud, slop and slippery roots time of year, this year seem particularly " slippery ". The frame seems really stiff and I think the limitiation at the moment is my suspension. I sort of get the feeling that it will be your suspension and suspension setup knowledge that will be the frames limiting factor.

Seems to ride like the old Mtb's of the past as in you sit up on the bike ( very steep seat tube ) rather than say the E10 where you seem to sit in the bike. I've always ridden Whyte bikes where you feel at one within the bike rather than say other brands where you do feel as though your bike is below you, I am sort of missing that aleady. I'm thinking of going Mullet with it to try and get the seat tube a bit slacker.

Solved the cramped cockpit by fitting a longer stem. Fitted an 80mm stem where previously I had a 30mm and it now feels comparible to my E10.

The motor is quietening down nicely and is already much quieter than it was. Still not sure about the power of the motor though. Set it up via the phone App as I haven't had a chance to put it on the BESST program. Seem to be getting only max about 500W's which with a 52 volt battery I was expecting a tad more, sort of around 600W's. The upside to the lower power is I have to work a lot harder and my little 300Wh batteries I had seem to be good for a couple of hours and 550m of climb. Pretty impressive and my legs are getting fitter.

At this stage I'm really wondering about actually fitting a fixed battery. The little case I have fits the batteries absolutely spot on, it takes about 3 minutes to change them and they work, do I really need to bother ? I think you can get 18650 batteries across the frame, which sort of leads to a 3P 13/14S 18650 battery. thats nearly 550Wh's.

My m820 motor produces 650W of power on a 43V firmware and a 48V battery

 

[TheIntolerantMan]

Had another 50K ride on Sunday, hard to really get anywhere near a knowledgible basis of what the frame is actually about due to the trail conditions. We are in prime mud, slop and slippery roots time of year, this year seem particularly " slippery ". The frame seems really stiff and I think the limitiation at the moment is my suspension. I sort of get the feeling that it will be your suspension and suspension setup knowledge that will be the frames limiting factor.

Seems to ride like the old Mtb's of the past as in you sit up on the bike ( very steep seat tube ) rather than say the E10 where you seem to sit in the bike. I've always ridden Whyte bikes where you feel at one within the bike rather than say other brands where you do feel as though your bike is below you, I am sort of missing that aleady. I'm thinking of going Mullet with it to try and get the seat tube a bit slacker.

Solved the cramped cockpit by fitting a longer stem. Fitted an 80mm stem where previously I had a 30mm and it now feels comparible to my E10.

The motor is quietening down nicely and is already much quieter than it was. Still not sure about the power of the motor though. Set it up via the phone App as I haven't had a chance to put it on the BESST program. Seem to be getting only max about 500W's which with a 52 volt battery I was expecting a tad more, sort of around 600W's. The upside to the lower power is I have to work a lot harder and my little 300Wh batteries I had seem to be good for a couple of hours and 550m of climb. Pretty impressive and my legs are getting fitter.

At this stage I'm really wondering about actually fitting a fixed battery. The little case I have fits the batteries absolutely spot on, it takes about 3 minutes to change them and they work, do I really need to bother ? I think you can get 18650 batteries across the frame, which sort of leads to a 3P 13/14S 18650 battery. thats nearly 550Wh's.

Firstly, thanks for all the details you've posted up they are really helpful.
Only recently joined EMTB, initially the LC930 thread, then the CEF50 thread and now here. I'd pretty much decided on the CEF50 until seeing this thread. They sell a small on ebay also.
According to the spec sheet, geometry is for a 571mm fork which is a 160mm(29), what are you using?
Did it come with UDH as per spec sheet? I don't suppose you accurately weighed the complete frame without shock before you assembled it?

 

[Waynemarlow]

According to the spec sheet, geometry is for a 571mm fork which is a 160mm(29), what are you using?
Did it come with UDH as per spec sheet? I don't suppose you accurately weighed the complete frame without shock before you assembled it?

Manitou 160mm Pro fork, its an oldy I had, been pretty good, still does a very good job but the latest forks are up another league in their small bump handling. Planning to change it as and when I can afford to my favourite Marzocchi Z1 or possibly a Z2.

Ahh as to weight, it was a sunny day, had a bit of time on my hands, all the parts to start to build it up, got the tools out and started to bolt bits on. Then realised I hadn't weighed it, Sorry. I think though on the website is the weight of the component parts, just add them together. Most carbon frames are around the 3kgs mark and don't vary too much. . Over on the thread E82 Dengfu frame now available are photos and weights of the E82 rear end components, I'm pretty sure the E69 components are one and the same. That just leaves the front end which will be say 200gms lighter or so. Should give you a pretty good idea of weight.

The biggest savings in weight are battery, tyres, and to a lessor degree, motor in my view. If you want durability over being a weight weenie then those components are pretty much the same on lightweight v full fat with only the batery size being the main weight offender.

Yes I think the hanger is UDH but with a caveat that I haven't measured it, just eyeballed it.

 

[TheIntolerantMan]

Thanks, I was interested in your fork length because of your comments about sitting upon the bike rather than in it, I too dislike the feeling of being perched on top so was wondering if you had fitted a shorter fork.
I was hoping the picture of the frame on the scales that Anton posted was with a shock, just out of shot. Looking through the E82 thread it seems that at 4kgs for the E82 then 3.2kgs for the E69 could be classed as lightweight, its all relative.
Guilty as charged regarding being a weight weenie. Looks like I'll be ordering a CEF50 then, I'll post a build thread when the time comes.