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Thanks for your help!

I’m burning through freewheels with my mid-drive Bafang 1,000 motor. I found a Sunracer MFE60 but it sells for $20 and I have trouble believing it’s a true ebike freewheel at that price. Other than that I can’t find anything that claims to be an ebike freewheel for 8-speed. I found an...

I have two batteries for my new bike — 48V, 17A Samsung. They don’t run in parallel, only one at a time. Both have the same problem. When they get under 50% on the display, they suddenly start to drop ten or fifteen percentage points at a time, then from 15% or so right to 0%, then, while still...

I just took my first ride on my new BPM fat-tire (4 inch) with Ultra motor. It’s as fast as I hoped (26 mph on flat with throttle only). But the battery is draining rapidly. I rode it 7 miles on highest level assist, pedaling the whole way without throttle, on mostly flat ground and drained...

Where can I find a beginner’s intro to tuning a Bafang Ultra motor? I have a bike with Bafang Ultra coming on Tuesday and I’d like to learn what I can about tuning. Thanks so much!

It looks like I’m about to buy their Bafang Ultra fat bike. I’ll let you know how it goes.

I’ve been researching hard into Bafang Ultra bikes, especially for ones with 21 amp batteries. I have found several on Alibaba but haven’t found any reviews or trustworthy commentary about the companies (other than Frey. Electrek.co has covered them extensively). None of the bikes compare to...

I’m thinking of buying a Frey bike. They seem comparable to the $4k-$6k bikes but at half the price and with bigger, stronger, Bafang motors and batteries. Even after paying for shipping from China it seems like the best deal on a high quality bike. Thoughts?

If you know, please share your knowledge. Thanks!

I see bikes advertising both G510 and M620 as Ultra. Can anyone clarify the difference? Thanks for your help.

I want to get a bike with a mid-drive Bafang 1,000 watt motor. My options are the older BBSHD with nylon gears, or the newer Ultra with metal gears. I’m interested in a bike with the cheaper BBSHD motor but I’m afraid it will be less reliable and won’t last as long. Should I hold out until I can...

— Less than 1 year old Fuji Ambient electric mountain bike. Bosch motor, battery and controller under 2-year warranty. — Retails for $3,900. Mint — Runs perfect and battery hasn’t lost an iota of power or range. — Elite Bosch drive system is top-of-the-line — same as the $7,000 dollar bikes...