I recently bought the Ebikeling 36V 500W 26" rear geared kit with LCD. I applied it to my Sun EZ-Speedster SX recumbent bike. The build quality is excellent as far as I can tell, & I've learned enough about the programmable LCD features in use to conclude it's an excellent value. It's not perfect, but it's easily perfect-enough for me. Combined with a 36V 15.6 AHr battery (I understand it would also work fine with a 48V battery), it displayed some unbelievable range for me, in pedal-assist, in flat-Florida this winter. The only nuisance: it's true in my observations that speed is not continuously & accurately reported by the LCD. I simply continue to use my Cateye bike computer I've always used & rely on it for accurate speed & trip details. I learned that I could program the LCD to provide PAS in 3-steps, or 5-steps, or 9-steps. In 3-step-mode PAS-1 (ECO), my bike pedaled along with effort at about 17 mph on a full battery; in 5-step-mode PAS-1 (ECO), I pedaled along about 15 mph; in 9-step-mode PAS-2 (ECO, PAS-1 mysteriously operates the same as PAS-0) I pedal along about 13 mph. When I want to go a little faster for the same pedaling effort, I just bump-up the PAS level. I've played with the parameters available with the LCD, so that I have a delayed, gentle onset of assist. I don't understand everything about the LCD programming: Parameter P11, PAS sensitivity, range 1-24, I set it to 12, because whatever it does is too subtle for me to notice so far. I really wish I had a theoretical, block-diagram of the LCD capabilities.

I like to take long rides and I was concerned about a kit & battery combination that would minimally get me 40+ miles pedaling. It had to be a geared motor, so that when the battery shuts down, I could still easily pedal my now-heavier bike, without any DD motor drag. I'm 67 years old & 230 lbs, nearly 3 years post-GBS (Guillain-Barre Syndrome) onset, but otherwise in decent cardiovascular shape.

I've done a little exploring of my available range: In 9-step-mode, PAS-2 (lowest available working assist-level, providing minimal battery drain, yielding maximum range)... You may find it hard to believe, but... I pedaled, continuously, 80 miles in 70+ degree, reasonably calm weather on flat, paved Florida terrain and had 2-of-5 bars remaining on my LCD battery gauge. Numerous factors including primarily the battery capacity & my pedaling contribution determine my range. Your results will vary. I'm happy that my eBike has more range than I do. I was a limp noodle after 80 miles.

Agreed, Ebikeling is easy to work with. I definitely plan to buy another identical Ebikeling kit for my other EZ-Speedster here in Illinois. I'd unquestionably buy a 20" rear geared kit from Ebikeling if one were available in a normal tire-width version, but they only offer a 20" fat-tire version currently, & I think it is direct drive, not geared.