Specialized Carbon 'Fatboy' and the new 7000W Cyclone MidDrive

[Robocam]

The Cyclone 7500 does not have a gear box, so it will spin at insane speeds (compared to the Cyclone 3000 which has a 6:1 reduction). Is it stronger? Maybe not. 120 amps is just 3 times the current of the Cyclone 3000's controller. Without that 6:1 reduction, it may only produce half the torque of the Cyclone 3000.

This guy has lots of videos of this Cyclone 7500 bike. https://www.youtube.com/watch?v=KemJO_B2FGE

...The 7500W motor from cyclone is a lot stronger than the 3000W... it can potentially eat drive chainrings like crazy.

As for cadence, yes, forget about pedaling along with it. Even the 3000W is pretty much useless for "pedaling along" Mine spins at 350 so I just "pedal along" even though my legs don't do anything.

G.

[gman1971]

Pity, but glad you got it working with a non Cyclone motor.

[SulshyBoi]

I Have created a new Topic for this Build

http://electricbike.com/forum/forum/kits/bafang-mid-drives/11770-specialized-carbon-fatboy-and-the-bafang-bbshd

[spinningmagnets]

That's great to hear....pics, pics, pics!

[gman1971]

Looking forward to see how this monster turns out... thanks!

G.

[SulshyBoi]

So I ordered 2 sets of adapters

the NINER BIOCENTRIC II EBB ECCENTRIC BOTTOM BRACKET is awesome and with some Hollow alloy Tube and some longer Bolts was easily extended to a 100 mm BB

but is unfortunately too big for my Bike so returned it.

the £5.00 J&L PF30/BB Right/BB386 EVO>BSA Bottom Bracket Conversion Adapter/Convertor

fits and with some home made spacers work perfectly

I will add some pics tomorrow

[gman1971]

How is this build coming along? Any news?

[spinningmagnets]

Well done, thanks for finding this and posting it.

[Ade]

so i have looked around a bit more and found these
NINER BIOCENTRIC II EBB ECCENTRIC BOTTOM BRACKET

its £84 or $89

but caters for thee BSA screw fit which means a 33 mm shaft

they will need longer bolts and some spacers for for the extra bolt length as these don't appear to come in 100 mm







SWEET YEA

Very nice indeed and if it works out okay, it'll open up a host of different bikes for the BBSxx. :)
Great work!

[SulshyBoi]

so i have looked around a bit more and found these
NINER BIOCENTRIC II EBB ECCENTRIC BOTTOM BRACKET

its £84 or $89

but caters for thee BSA screw fit which means a 33 mm shaft

they will need longer bolts and some spacers for for the extra bolt length as these don't appear to come in 100 mm







SWEET YEA

[SulshyBoi]

theey are aluminium

[SulshyBoi]

Pic 1 was £120 in UK and
ebay
Wheels Manufacturing Pf30-Ebb Ecentric Bb For 24Mm Shimano Systems Red
$127.98

Pic 2
Origin8 Bottom Bracket Adaptor Eccentric To PF30 Shimano Rd/Mt
was arround $59.99


what in not sure of is the 24 mm bit as Josh says thee Bafangs are 33 mm not even sure its the same thing i am comparing there

[Ade]

Seriously cool info on those BB adapters. Are they plastic or aluminium? I would hope the latter!

I think I would go the more expensive option (weird that as there is less material there!) - that way gives you more flexibility with separate spacers. The other (Pic2) may need spacers anyway - pity you can't get measurements of that.

How much $$$ are we talk here?

Edit: Never mind, found them on ebay. Not extremely cheap then. ;)

[SulshyBoi]

So I have done some Digging with Josh Luna Lab Luna

and He found this


​
and it can be done

so i ordered some bits off Ebay

New Longer Chain

A tool to put the ends back in

PF30/BB To BSA Bottom Bracket Conversion Adapter / Converter

As I looked more closely

there will be several issues

1. the motor will not be flush to the BB (I knew this from my other bike)

2. the motor would be too long as i had a 120 mm BB BBSHD

3. the motor spacing between the axle and the casing might not have enough room

4. I would need Spacers approx. 2 cm

so I would need Eccentric Bottom Bracket Adapter To PF30

Pic 1
OR this with spacers already built in ( and cheaper)
Pic 2

The first Issue is no one does this in 100 mm BB only 68 mm but that just means sourcing longer bolts


so now i need to decide which way to go

Pic 1

Negative points

Longer Bolts
Needs Spacers
Expensive

Positive Points

if fitted at the correct angle will mean the Motor will be further from the frame so less gap on motor side ( but excess is on other side)
Better chain line
​can be angled for frame clearance

Pic 2


Negative points

Longer Bolts
Needs Spacers Possibly??
unsure of thee size of built in spacer
longer delivery

Positive Points

spacer there and solid for the motor fitting
can be angled for frame clearance
Third of the Price

as im away for a bit delivery may not be a problem

[spinningmagnets]

You are the first builder I have heard of adapting a PF30 BB to a mid drive, so I will be watching with great interest. Thanks for posting pics to help others who want to do the same thing.