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DIY e-bike with donor bike + mid drive kit?

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DIY e-bike with donor bike + mid drive kit?

Old 05-09-18, 09:49 PM
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s_m
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Question DIY e-bike with donor bike + mid drive kit?

Hello all.

Completely new to the DIY side of bikes and looking to build a e-bike donor bike + mid drive kit. As I understand it, the bike's bottom bracket size is important: width of the BB shell and the inside diameter of the shell.

I have my eye on a particular bike but don't have those dimensions (the manufacturer is not responding and no local stores stock it) - Giant Escape 1.
I also have my eye on a particular ebike kit: LunaCycle Bafang BBSHD Mid Drive kit.

From experience, do folks think it's wise to just go ahead and get the bike and then develop the drive kit around it or is that a rookie (and potentially expensive) mistake? Also, has anyone else out there done this and is willing to share a few words of wisdom? Understand 1/2 the fun is the challenge but trying to avoid a potentially expensive mistake.

Cheers!
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Old 05-09-18, 10:31 PM
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The specs state "threaded cartridge" so the diameter of the BB shell should be fine. The other important dimension (IMO) is BB width. If it's 73 mm you may not be able to use a "jam" nut (which prevents the other nut from loosening). I would secure that information before purchasing the bike unless that situation has been addressed with the BBSHD (it hasn't with the BBS02).
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Old 05-11-18, 08:47 PM
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I did something similar to what your talking about.I got a Diamondback Haanjo Trail and put a BBS02 on it.The bikes are close but the DB has drop bars.The BBS02 is road legal and a little lighter total weight is 41 pounds with a 52v 13a shark battery.While the kit has a throttle I never put it on because just some help on the bad hills is what I'm after.This kind of biking is a lot of fun with the worst of the hills softened up a bit.
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Old 05-16-18, 11:48 AM
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Originally Posted by qbiker View Post
I did something similar to what your talking about.I got a Diamondback Haanjo Trail and put a BBS02 on it.The bikes are close but the DB has drop bars.The BBS02 is road legal and a little lighter total weight is 41 pounds with a 52v 13a shark battery.While the kit has a throttle I never put it on because just some help on the bad hills is what I'm after.This kind of biking is a lot of fun with the worst of the hills softened up a bit.
Ohhh, I'm jealous. Sounds like a nice setup. I've been thinking of doing the same on my spare gravel bike. But I'm just liking my 29lb drop bar speedster - just wish I could go a little bigger on tires.
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Old 05-20-18, 03:40 PM
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I did the Bafang kit on a Salsa Fargo last summer, adding a good front shock and 2,25 tires. I am in the process of building a Salsa Vaya now that will also have either the Bafang or BBSO2. The build is not difficult, just make sure the SW is legal in your area.

Last edited by cyber.snow; 05-20-18 at 03:41 PM. Reason: Mistake
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Old 05-20-18, 11:36 PM
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I also put a BBS02 750W kit on an old Diamondback Wildwood. Unlike a hub motor, it's a pretty quick install. As far as specialty bike tools, you need a chain breaker tool and a pedal arm tool. The pair is under $20. There is also a special wrench recommended for the Bafang nuts. Also $s0. Sometiimes included by some vendors. Plenty of videos to explain the install on video. Might take longer to watch the video than do the install. Well, not really.
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Old 05-21-18, 10:06 AM
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You need a tool to remove the bottom bracket too (or have a bike shop do it). I use a Hozan Lockring Tool to install the circular "nuts" that secure the BBS to the bottom bracket. Somewhat expensive at $30 or so, but works magnificently (I can beat on the end with a rubber hammer to insure the "nuts" are tight).
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