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But what you're describing is a bespoke electic bike. Built with premium hardware and is unique. Which is very cool. Bespoke anything carries a cost premium be that clothing, cars, etc. My Townie and Mongoose are basic kitted bikes and perform well on a budget.

Bummer that you've had these glitches. If I had a broken controller and a janky wheel, that would make this project harder to recommend. Let's set those aside for the moment. Great project with the kids! You guys built something, kicked butt!, and also have a lot of follow on you can do...

My reply to "cheating" An everyday cyclist exercises from 0-15 MPH, whereas I exercise from 15-30. I pedal on top of whatever pedal-assist baseline I set. Stated another way. Let's say we're both climbing 50 stairs of a 100 story glass building. The everyday cyclist starts at the bottom...

See if you can find a Gary Fisher ebike conversion someone has done and follow what they did. Before converting my first bike, I found a few Townie conversions between endless-sphere.com and Youtube. This bike has an ISIS bottom bracket, so the typical square bracket pedal assist sensor...

The key to a painless conversion is a suitable bike/kit pairing. I expect your Gary Fisher would require some custom tinkering. Probably not a good match. A newer Specialized Roll makes a good pairing and is nearly plug-n-play. All you need is to swap out the trigger shifters. My Electra...

The PAS cadence sensor, often paired with hub motor style ebikes, does have that 'get-up-and-go' feel once you start pedaling. The amount of 'go' is linked to the PAS level setting. Once you get going the PAS will continue to smoothly accelerate to the selected assist level. My bike has 5...

I'd bet Greenergia sources their cells from Bluenergy (aka Greenergy at Aliexpress). Your wife's bike rim in the picture earlier has a Bluenergy and a Greenergy decal.

Yes indeed! The brakes are a bit sketchy. I think Mongoose counts on enthusiasts to buy their base bikes and upgrade.

Yep. Game changer.

This graph confirms the value of the Joyisi battery. You get value, name brand LG cells without paying the premium for energy you may not need (See also: SSD/CPU/RAM/Hellcat/93 octane). Here's my new class 3 grocery getter powered by the same 2000 mile Joyisi I swap between the Townie..

@Browneye converted his wife's Specialized Roll to electric last week. You'll find pictures of the bike and a short video in this thread. https://electricbikereview.com/forum/threads/turn-your-bike-into-an-electric-bike.24816/ He went with a rear-hub conversion but also looked at mid-drives.

I have this 48v/13Ah Joyisi battery. After 2000 miles, it still performs like new. https://www.amazon.com/Joyisi-Battery-Lithium-Samsung-Electric/dp/B07F2KRWSV/ref=sr_1_8?dchild=1&keywords=joyisi&qid=1572794519&sr=8-8 My battery is packed with LG cells. The Townie doesn't have suspension...

Everyone needs more than one fishing rod. o_O Also, count the spokes. If the Roll comes with 36 hole rims, you're golden - you could rebuild with the Bafang motor. My Mongoose rims are 32h - that meant a new rim.

@Thomas Jaszewski Show us the goods... Don't be so mysterious.

Do you have more data on the mig? I have three DP-C18.UART 's and they all report 'Bafang Ultra Drive System - Heavy Duty' on bootup. Luna offers the DP-C18 for mid-drives. Youtube videos for the DP-C18 speak to mid-drives. Outside of Bluenergy, I haven't seen a DP-C18 paired with any...

The C961 and DPC18 displays are meant to be paired with Bafang's mid-drive motors (BBS01/BBS02/BBSHD). The mid-drive controllers have the ability to offer 9 PAS levels - though some default to 5. My controller/DPC18 combo offers 5 PAS settings. Six if you include 0. The Bluenergy...

Yes... But not like this. :D

You want brake cut-offs. Particularly while your wife gets used to the pedal-assist engagement. She may be navigating a narrow sidewalk or around a hedge or similar and the pedal assist kicks in. A reflexive tap of the brake stops that. You may prefer the brake levers with integrated...

I my case, I only needed 5mm or so on the spindle to host the magnetic ring. The sensor edge is essentially flush with the cup below. The smallest chain ring on my Mongoose Envoy is 22t and is a chain-height taller than the magnetic disc. It's tight quarters but all works. Is this the...

I see now. Examples of a left side installations with a two piece PAS (sensor ring + magnet disc) are harder to find. You need a left cup with a flange to secure the sensor ring on the left side of the crank. Also, this video shows where the installer flipped the sensor in the mount to...