SZZS specific CEF50-main thread (initial builds and troubleshooting related only)

[TCFlowClyde]

See the M820 motor discussion for preliminary details...just making a specific CEF50 frame owners topic.

Total cost with shipping for me was $1750 US. Production starts this February. So, I put down a $500 deposit for a L-size hoping I don't get burned.

 

[TCFlowClyde]

Here's the 720Wh in-house, bigger battery option. The smaller is the 410 Wh Bafang battery. Both are integrated (motor dismount required) in order to save weight on the frame cutout, cradle hardware, and key latch system. Purportedly, this strategy can save 2-3 lbs off the total build. We'll see!

No range extender is planned. So, I opted for the bigger one knowing the 75Nm/95Nm peak motor power will inherently consume more battery range. Plus, I'm a heavy Clyde-rider.

 

[TCFlowClyde]

What does CEF50 stand for?
C = carbon
E = electric PAS.
F = Freeride?
50 = under 50 lbs?

Or it's just probably a random engineering tag?

 

[TCFlowClyde]

So, simply why not await the stealthier, swappable 430 Wh battery of the Transition Relay? (Which I've been drooling over since I the rode the lesser powered/suspension travel of Trek Fuel Ex-e and ironically timed, Transition Relay public announcement!)

Is the answer. Especially, since, I found out that the Relay will likely not offer a frameset option (spoke to Transition last week) as lowest price point...I kinda killed it as the go-to-rig-in-waiting! They teased at the frameset option, but that seemed to be disconfirmed as time passed.

Logic: What I lose, in stealth and convenience of the trail-side swappable spare battery (Fazua is late with their 250 Wh range extender according to Pivot in last week's conversation) I'll gain in M820 beefier 75Nm/95Nm peak torque with the heavier 720 Wh battery.

Overall, I'm shooting for 42/43 lbs full wet-weight: pedals, higher end spec with thicker, heavier carcass, 27.5er plus 3.0" incl. sealant/foam inserts, and lastly a slighter heavier 180 Zeb Ultimate fork/ 160 ish RS ultimate coil rear shock.

Note. I rode a friend's Fuel Ex-e and luv'd the lightness and agility, and impressive low silhouette leading to the uncanny stealthness. He should be able to ride all mtb singletrack in North America relatively worry-free. I also luv the TQ50 small design, but it should be enhanced to the future TQ65 with the short super-turbo burst mode for my needs. And I need the Enduro suspension 170+f/150+t travel, with an easily removable battery...like the Transition Relay Fazua60, in order to pack a spare as I'm a heavier rider.

But alas, The Relay dream is not likely for this year's budget...maybe next year's. Plus, I really didn't want to sell a kidney to help finance it. Consequently, I'm giving the M820 CEF50 a try with less economic risk.

It'll be interesting to see who else is willing to Beta-test their CEF50 rendering for the Bafanger community at large!

Here's to a higher mid-powered, semi-stealthy, 42/43 lb build. Bravely done if you buy one too!

 

[thaeber]

Great plan, and I think You will not be disappointed. May be You can overstroke (210x55 / 216 x 63 shock?) the frame a litte to get more travel and better matching Your 180mm ZEB.
Would be very interesting to know if the battery supports CAN communication with the motor controller and display. If not, it would be easy to add a DIY battery pack as range extender by using a split / parallel connector. Cant wait to see first pictures!

 

[TCFlowClyde]

Great plan, and I think You will not be disappointed. May be You can overstroke (210x55 / 216 x 63 shock?) the frame a litte to get more travel and better matching Your 180mm ZEB.
Would be very interesting to know if the battery supports CAN communication with the motor controller and display. If not, it would be easy to add a DIY battery pack as range extender by using a split / parallel connector. Cant wait to see first pictures!

Yeah, I thought about the 216x63.5 RS coil, but I went with 210x55 to "overstroke" the rear within the manufacturer's eye-to-eye spec...I was afraid to truly size up for fear of the full carbon swingarm and my heavier weight. The kinematics may get me closer to 160mm. It should be more than 155 mm and much more than the 150 mm spec.

Plus, the RS 210 x 55 coil was on sale for $300 USD....$200 off my limited, overall suspension budget for the '22 model...so bonus savings!

I also wanted the newer RS coil upgrades, especially the purple button bottom-out adjustor. But I'm playing it safe. However, if others go for the bigger coil successfully, I'd definitely spend the extra money on those upgrades and bigger stroke later on!

 

[temon10]

I hope it will be as good as we all imagine. especially the M820 performance.

 

[TCFlowClyde]

I hope it will be as good as we all imagine. especially the M820 performance.

Me too! Hoping I didn't just waste $1750.

 

[temon10]

Me too! Hoping I didn't just waste $1750.

i think we will be the first batch to test M820 in real world hahaha....

 

[TCFlowClyde]

i think we will be the first batch to test M820 in real world hahaha....

Oh great! You ordered a frame as well?

 

[thaeber]

Yeah, I thought about the 216x63.5 RS coil, but I went with 210x55 to "overstroke" the rear within the manufacturer's eye-to-eye spec...I

Be careful, the additional 5mm stroke will give You 10-15 mm more travel depending on end of stroke ratio / progression. Good that there is no bridge between the seatstays, but worst case the tire may hit the seattube. Did You consider a mullet setup with 27.5 rear wheel to be on the safe side?

 

[TCFlowClyde]

Be careful, the additional 5mm stroke will give You 10-15 mm more travel depending on end of stroke ratio / progression. Good that there is no bridge between the seatstays, but worst case the tire may hit the seattube. Did You consider a mullet setup with 27.5 rear wheel to be on the safe side?

Exactly, I was hoping the leverage curve might be similar to my LCES04, I think 2:1 ratio. So, I guesstimate 7-10 mm increase, 10-15 would be nicer!

It looks like this linkage will allow the back tire clear the seat tube with room to spare. Also, the other issue were seat stays becoming more vulnerable to breaking if I attempted to overstroke out of eye-to-eye spec at 210 mm to 216 mm due to creating a higher pivot point, especially carbon, with heavier riders.

But, I'll ask the salesperson soon to see if their engineers will produce a chart for public consumption to better predict travel and see how progressive the frame kinematics can be.

On mixed wheelsize: I myself prefer the mullet with a longer chainstay.(450 mm). But I decided to keep with my 27.5er+ carbon wheelset to save on the cost on the front 29er. So cost limitations.

Also, I bought the 180mm (v. 170mm spec) 27.5er fork because I knew it would give a higher BB height to compensate for the slight lower 27.5 plus tire height at 28.75". Rake was still 44.4 deg offset for longer travel. Bonus, was the new 3.0 charger damper and buttercup rebound adjustments found in the Zeb Ultimate going forward. And the cost reduction was nice at $700 USD instead of $1150 for '22 model.

Together the Zeb '22 with RS ultimate coil '22, I was able to spend $1000 USD! So, finances guided my travel and wheelsizing.

 

[thaeber]

Sounds like a plan mate! I missed the info that You plan to run both wheels 27.5 somehow, but I think with the frame designed for 29 rear wheel there will be no issues with 27.5 and increased 55 stroke.

 

[TCFlowClyde]

Sounds like a plan mate! I missed the info that You plan to run both wheels 27.5 somehow, but I think with the frame designed for 29 rear wheel there will be no issues with 27.5 and increased 55 stroke.

Esp. the taller 27.5 plus are 28.74", so close to standard 29" wheels on bigger 180 mm fork should yield similar angle to the front end to the spec 29/170 mm fork. Get a little more plushness on the front end with 10 mm.

 

[LAnton]

We will test together. But I want to make the lightest electric bike possible. 140mm front Pike and 140 rear sid. Since I have a set of 27.5 and 29 carbon wheels, I will choose the best option. I will also receive a frame no earlier than the end of February. I hope to get the M820 motor in the near future.

 

[LAnton]

It's a bad idea to make a non-removable battery. Then you will add a range Extender that weighs another 2000 g. It is better to install a removable battery bottle and you will have two spare batteries. Aliexpress has a very large selection of battery bottles.

 

[temon10]

It's a bad idea to make a non-removable battery. Then you will add a range Extender that weighs another 2000 g. It is better to install a removable battery bottle and you will have two spare batteries. Aliexpress has a very large selection of battery bottles.

 

[temon10]

that one look nice, 36v 7Ah enough for about 40km i think.

 

[thaeber]

I saw the same recently on Amazon. 36V 10.5 Ah means 380 Wh, extending the bike to a whooping 1.100 Wh overall capacity!

 

[TCFlowClyde]

that one look nice, 36v 7Ah enough for about 40km i think.

Would be nice extended range

 

[TCFlowClyde]

I saw the same recently on Amazon. 36V 10.5 Ah means 380 Wh, extending the bike to a whooping 1.100 Wh overall capacity!

View attachment 103950

1,100 Wh capacity is pretty sweet!

Now if it's relatively compatible to splice in?

 

[TCFlowClyde]

Would be very interesting to know if the battery supports CAN communication with the motor controller and display. If not, it would be easy to add a DIY battery pack as range extender by using a split / parallel connector. Cant wait to see first pictures!

So, can likely splice this Amazon 380Wh extender in fairly easily?

 

[TCFlowClyde]

Nice find peeps! Here's the $234 USD Amazon link...

Water Bottle Battery/Cup Battery for 500W 350W 500W Bafang BBS001 and Ebike Conversion Front Rear Hub Motor(with Charger) https://a.co/d/dqQQrJI

 

[thaeber]

Yes, but You need to be careful. You need an Y-split cable in parallel configuration. You need to install / connect the extender battery when both (frame and extender) battery are fully charged. Otherwise there will be a high current flowing from the higher voltage battery to the lower one, that may destroy something.

 

[TCFlowClyde]

Yes, but You need to be careful. You need an Y-split cable in parallel configuration. You need to install / connect the extender battery when both (frame and extender) battery are fully charged. Otherwise there will be a high current flowing from the higher voltage battery to the lower one, that may destroy something.

Ok cool.

I'll plan on pursuing this option after I get the build setup in a few months.

 

[Tilt]

410wh+380wh=790wh yes

 

[thaeber]

True. And 720 Wh + 380 Wh = 1.100 Wh.

 

[MI Rida]

Shouldn’t this be in the DIY ebike builds section instead of the motor section?

 

[temon10]

Ok cool.

I'll plan on pursuing this option after I get the build setup in a few months.

 

[temon10]

View attachment 104257

use that for dual battery???