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Yes, we have a battery (internal tube version) that works perfectly with DOST downtube. The auxiliary battery used by DOST is a bit different. If there is enough demand, then we make it available but we know exactly how it is designed and the communication protocol.

Press and hold the (+) button to turn on the headlight Check the light connector under the spiral wrap is firmly seated (sometimes, a loose connection here is the culprit) The rear brake light should irrespective of the head light mode

Thank you for this incredibly detailed post and for documenting it so thoroughly. Very few people do this level of due diligence before purchasing an E-bike! A few points to add to your post regarding 2024 Photon Pro version 2: We have found that many people really like the beryl green color...

The rims are tubeless ready, and tubeless conversation can be done by any competent bike store. It is worth considering if you are riding on rough terrain, but otherwise, the Super Moto-X should do the job.

I had a discussion with the director of UL, who oversees the E-bike division. They seem to be committed to holding high standards when it comes to UL-2271 and UL-2849 standards. From our own experience, it is clear that UL holds a more stringent standard than other labs. There are certain...

While we were at Bafang, the media team told us that GMBN would visit them shortly. For years, Bafang was seen as a DIY kit supplier; now, they are opening up to a larger OEM market more substantially. Here is a video of GMBN about Bafang.

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.