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Zen team is excited to share the UL-2271 certification for our batteries. We take safety and E-bike battery quality very seriously and we invested significant capital to ensure our customers can charge their batteries without worrying about safety. Recently, E-bike battery fires have caused many...

The author can Zen E-bike batteries to the list as well. We now have official certification from the UL labs. It will get updated on the UL database in about 1-2 weeks.

Great to hear that, John! Wishing you thousands of miles of fun and happy memories on the Photon Ultra.

Let us know if anyone has trouble sourcing parts related to Bafang. Our team would be happy to help.

I believe we connected last week, and our service personnel might have spoken with you regarding the belt tension. Please let us know if you need any further assistance. @DrewInSK , Thanks for sharing your picture. We have not forgotten to ship your battery order. It is just that we had a...

Thanks for the feedback. This is precisely why we started building integrated rear racks on all our Photon models. One way to enhance the rear rack's load-bearing capacity is to use a slightly longer bolt with a washer that locks on the other end.

We do have replacement batteries for DOST - the 48V, 14Ah version. A customer walked into our office yesterday and we found that our photon mini battery (48V, 14Ah) works perfectly with Dost. The BMS for this battery was designed by us to meet UL-2271 standard and we use 3-pin charging port...

We had an opportunity to visit the Bafang HQ and spend 2 days visiting their facilities, test riding E-bikes, and talking to their R&D team. There is so much to unpack, and we will share videos and articles in this thread. What was surprising to hear was that the son of Bafang company's...

Are you sure about this? The motor armature of the M620 is 2x the size of the Bosch CX, and the Bafang M620, in my experience, is a lot more powerful than Bosch CX Gen2. I have ridden both of them extensively and I agree that the torque sensing is sub-par. I did have a discussion with the R&D...

Wow. I am impressed by how friendly and knowledgeable many forum members are!! Court Rye would be so proud.

We have not checked if 60T would work. I will check with our team.

Hey John, @scrambler posted some detailed gear ratio analysis. What would be the speed at 65 RPM if you used 55T front and 20T rear?

Awesome. Thanks for sharing! We designed the bike for long-distance rides like this and I am really happy that you're making full use of it.

Awesome. I am glad you're enjoying your bike. To our knowledge, Zen and another brand in Switzerland - Flyer are on the only brands to have two different charge modes built into the bike BMS. The cells used in Photon Pure and Photon Pro models are 21700 format - Samsung 50G. The BMS was...

This feature will enter the market later this year. We saw the new displays from Bafang and they have dual battery options, Class 1,2,3 can be changed on the display and tune the torque and power curves using the App. This is possible because all peripherals communicate via CANbus. This will...

We are currently sold out. If you place an order now, the delivery will be sometime in late August. If you can wait until September, then you will be able to use Rohloff E-14 electronic shifting. While I was at the Bafang factory, we tested the new electronic Rohloff system, and it worked pretty...

Thanks for sharing this excellent analysis! Very helpful for riders. Typically, most motors are tuned to provide high torque and power at around ~75 RPM cadence. This is also beneficial for knees. On my previous bike, I did use 55T and 20T for Rohloff and was able to maintain 23mph average...

You have very sharp eyes! Because our BMS and charger all communicate on CANbus, we have to use this. When you have CAN, the charger can precisely show SoC and stop the charging process once it reaches the desired voltage and error rate is much smaller.

We toured the Bafang factory 2 days ago, and the new M560 has a lot of potential for the E-MTB market. I will share more details when I am back in Canada.

The controller is 20A and it can fine-tuned at the factory level, not using the display. See some details of the controller in a post under the Zen motor thread. 👆