Would this fit, a BBSHD?

[Nvreloader]

Guys,
I want to build a bike for the better half, she wants to ride, but does not like my heavy weight Wart Hog and Juggs 4 bikes. She want the lightest one possible,
and I have come up with these requirements to fit our trails/back roads around here.

1. Must be a step thru style,
2. Must be a Bafang 750/1000w Mid Drive, BBSHD ??
3. Must have a 48 or 52v battery with Hailong connections, either 4 or 5 pin, I have several of this type of batteries.
4. Must have 26" tires around 2.25 - 3.0" wide tires,
5. Must have a Torque sensor, with a throttle,
6. Should have at least 5 gear shifter/derailleur gearing,
7. Must have fenders,
8. Be light as possible,

I have found this style of bike and the wife likes it,

Cruiser 1 Step-Thru - Trek Bikes

Start your two-wheeled adventure with Cruiser 1 Step-Thru. See the bike and visit your local Electra retailer. Shop now!

www.trekbikes.com

or this bike,

Cruiser 7D Step-Thru - Trek Bikes

Start your two-wheeled adventure with Cruiser 7D Step-Thru. See the bike and visit your local Electra retailer. Shop now!

www.trekbikes.com

These bike weighs in at 36 and 34#'s.

I have been doing some research and found out it is possible to have the motor mounted above/in between the the seat/forward tubes, which will have the highest ground clearance possible, with above motor, for this BB forward mounting type of bikes.

Is this information correct? I don't know.

My choice of motors will be this one, as I am kinda familiar with Bafang motors and this one can be programmed/tuned, and don't want a prioritized brand name etc. https://www.amazon.com/gp/product/B0BZ863FXT/ref=ox_sc_saved_title_1?smid=A2SZTSKL3T1TO0&psc=1

I would appreciate your valid thoughts or suggestions on my build.
Tia,

 

[6zfshdb]

Where do you plan to mount the battery? Both bikes you link have curved tubes, which can make it difficult. I had to build a custom bracket for the curved tube on my Pedego. Add a rear rack maybe?

I'm sure others will disagree and this is just a personal observation, but I found rim brakes to be inadequate on all the e-bikes I tested. I have 3 Trek Shift series MTB's with rim brakes and gave up my conversion plan because of the brakes. I ride some semi rough, loose surface trails and I've never been pleased with rims, especially when wet. Again, this is just my personal opinion and they may be fine for your wife.

If it were me, I'd consider the Priority Coast with the disk brake option:

Rust Fighting Beach Cruiser | Priority COAST Beach Bike | Priority Bicycles

The Priority Coast is the only belt drive beach cruiser designed to tackle the salt, sand, and water in coastal environments.

www.prioritybicycles.com

I'm spending your money here and It's twice the price of the Trek, but it would make a great conversion.

 

[Nvreloader]

6Z
I would add a rear rack on the back for the battery.
As for the brakes, I wasn't sure which way to go.
The better half is NOT a fast rider maybe 15 mph max,
she is afraid of speed/heights or anything else above walking speed.
I'll read the spec's and check things out. Not sure about a belt drive out here in all the dust/grit 24/7.
I don't have to worry about rain, as we only get 4-5" per year, during the winter time in snow form, and I KNOW she will not ride in the snow, but I will.
I am hoping that some of the members here may have converted this type of Electra frames to electric and pass along their info.
Thanks,

 

[Nvreloader]

It doesn't appear to be much information or help with this kind of elect conversions for this style of bike, or converting to a BBSHD motor.
I haven't received any information back from the OEM supplier as to the BB size or spacing of the bars/tubes, so far.

6z, I do like that this bike comes also complete with the disc brakes and several speeds, that helps with the brakes etc.
I don't plan on riding near the ocean, so I am not to sure of the rust proofing on the bike.
All thou we have VERY mineralized ground here and is Very corrosive to electrical systems etc.
Tia

 

[gromike]

The bbshd is overkill for what you want the bike to do. The bbs02 is lighter, and has plenty of power.

 

[Nvreloader]

Gromike
Even the 750w model?
Everything here is up hill it seems like, I don't want to have to pull her up the hills, as she can't peddle very well, and will use the throttle at very slow speeds..
I am attempting to find the dimensional spec's of these types of motors, so I can check the fitting clearances for all the step thru bikes that I think will fit.
Is the BBSo2 programable like the BBSHD?
I thought, I had saved that info on this plastic box, but can't find it now.
Tia,

 

[Chargeride]

No torque sensor on the bbshd..you need the M635, much more expensive

 

[gromike]

I have a 52v 750w bbs02 on a Trek 7.2. It will do 35mph, level ground full charge, on the throttle. I do have short steep hills and have no problem, though I do shift to the lower gears. The bbshd is a kilo plus heavier, and at 1000w technically illegal for road use. It does shed heat better.
Regardless, for a powerful ebike you will want a capable donor, and the ones you linked seem rather anemic. At the speeds that these ebikes go I have become quite fond of full suspension. On the Trek I almost had the handlebars ripped from my hands, only narrowly avoiding what would of been a disastrous wreck. I then added a suspension fork, then a suspension seat post.
One bad wreck can ruin a life, so don't cheap out the bicycle.

 

[Chargeride]

You only need the bbshd if you are going to fully load the motor continuously, Ive climbed a mountain non stop with the bbshd and flattened a 700wh battery in 30 mins.
It was only slightly warm to the touch.

 

[Nvreloader]

I found the lightest full size bike, by accident, I kind'a like it,
and it has 27 gears, at 31#'s?, but I don't know if a elect motor will fit?? Made in the USA. ymmv

Paratrooper Pro | Montague Bikes

The Paratrooper Pro is a folding mountain bike that builds on Montague's classic military model with upgraded components. Tackle the toughest terrain with 27 speeds and 100mm of suspension travel or utilize the fork lockout and versatile tire tread for hard packed trails and the occasional...

www.montaguebikes.com

 

[gromike]

I think putting a motor on that bicycle (especially a mid-drive) ruins the whole concept of the bike. A hub -drive might work, but where would you mount the battery?
If you want a deal look for a lightly used older pedal bike. They're out there, hopefully stored dry. Most of them are easy to motorize.

 

[Nvreloader]

New info just found, yes, I can do it....

Montague folder with a BBSHD and a Rohloff hub - Electricbike.com Ebike Forum

I have over 100 miles on it so far, and it is working great. My first 9 year old Montague got converted to a BBSO2 last winter, and it also worked out real

electricbike.com

I don't know anything about a Rohloff Hub??
ymmv

 

[Nvreloader]

OK guys
Can I get a valid answer to this question:
This is going on my Montague bike I just acquired,

Which of the elect motor kits, can you pedal like a standard pedal bike with the electric motor shut off and NOT FEEL like your are dragging a 50# boat anchor behind?

Or put it another way, which elect motor kit has the LEAST resistance when pedaling?

Your thoughts or suggestions.........
Tia,

 

[gromike]

Should be most mid-drives and geared hub motors, and even a direct-drive hub motor can be electronically "freewhweeled".
Though, all ebikes seem to pedal with a lot of deadweight when go to to 0 PAS.

 

[Nvreloader]

Thanks Gromike
On all my electric bike I use Eco 1 when pedaling, that's where I get the best mileage.
I have spent lots of time researching this electric motor conversion, and have found no information on which motor would fit except for the BB widths info etc.

This new bike "Old Blu" (Montague Comfort) has a BB width of 79mm, so I believe that I am committed too a 100mm motor like the BBSH02 or BBSDH to get the mounting shank long enough to fit thru the BB tunnel.

What I can't find is any measurements for the gear housing/chain ring housing to see how much clearance is needed etc.
Back to researching the info needed for clearance.
Thanks,

 

[Nvreloader]

Here is some more info on adding a electric motor to a Montague folding bike.

BAFANG power for the folding Montague for the airplane

I started the process today, and unless I am missing something, it would appear the Montague is a prime candidate for a mid drive BBS02 (or similar) type of drive. After finally realizing the sprocket side bearing retainer nut was left hand threaded, it was pretty quick and simple. Keep in mind...

endless-sphere.com

 

[Nvreloader]

More electric motor conversions for a Montague folding bike.

(Art)istic eBike

This is Babs the ebike; named after my wife Barbara . She just arrived and I will test ride her tomorrow. Hopefully.

forums.electricbikereview.com

Tia

 

[PedalUma]

@Nvreloader, You will want a ToSeven DMO2. The frame curve is handled with stacked spacers. Use Topeak Versamounts for a third attachment point. These advanced motors are Fully Programable in every regard and can come with a throttle. Keep in mind that throttles are not needed with torque sensor bikes. You use your foot instead of your thumb to apply the pressure to activate. Throttles also take more ugly and thick wires. Use a slim battery of highest quality cells with the best BMS in an all aluminum case with an ON/OFF switch, USB port, and smart charge port. It will fit. Keep all weight low and centered where a nautical engineer would put weight on a sailboat. Rack mounts want to flip on descending corners under breaking. She would crash. PM me if you want a good battery for this build.

 

[Tom@WashDC]

Take PedalUma's advice for sure.