BBS02 on a cargo bike.

[top drive]

I am looking to convert an xtracycle freeradical longtail converted thorn raven enduro MTB frame.

Im looking at a 14ah samsung bbs02 mid mount to assist with hills when loaded.

Couple of things - the BB has an Excentric system held in place with 2 set screws underneath.

Is there any room under the BBS02 for these set screws - they stick out about 15mm or does the motor hang close to the shell - anyone got any photos ?

 

[top drive]

BB looks similar to that but the bolts dont protrude as much .

I thought if i stuck the BB at its lowest setting i may have room.

Short of cutting the bb off and welding on another - any chance of fitting it ? ( i could remove the set screw bolt stubs and weld them on in another place - we have the technology)

short of that its new frame time i guess - shame as make do and mend - this is lying about and is useless to me as it has no mech hanger, a strange sized seat tube , very litle tire clearance and no rack mounts.

One other thing that springs to mind - any issue running a mid drive through such a long chain run ? IIRC the xtracycle needs a double length chain ?

 

[top drive]

Doing a little more research into this. Upper picture how motor mount , lower picture is what i have specifically ..... I MIGHT have enough room if i rotate the EBB insert round to have its lowest point at the motor mounting - I may have to relocate the stubs for the EBB tensioner - i may just epoxy(bakerlock for anyone that knows) the EBB unit in place once i get it all set up. ........(its alloy and frames steel)

Its been a slow shift so far

But any other ideas welcome.

 

[D8ve]

I use about 2 1/2 chains and no issues. I have fitted a couple of guides not shown in this picture.

 

[anotherkiwi]

Sorry you have been out done D8ve! The other day I saw a large Givi motorbike topcase on a 16" folder. Your back boot looks quite normal!

 

[D8ve]

Sorry you have been out done D8ve! The other day I saw a large Givi motorbike topcase on a 16" folder. Your back boot looks quite normal!

Dham you to clackton sir. I am undone. I shall have to fit a garden seat box at once.

Or perhaps do a streamlined tail box now. Just to get and extra 1.5kph out of her.

 

[top drive]

now...... thats an idea.

As a result of a m/cycle car interface my dad has a spare xjr1300 top box.........in poo brown.

Would there be a benifit to going for the bbsHD motor - the cost would be an extra 300 quid - but as its a complete redesign and reputably "unoverheatable" is it worth it or is the uprated BBS02 more than adequate - especially as i will fit a deore 11-36 cassette at the back (and space the ring over at the front with a california E bikes spacer) - coupled with my massive chainstays i shouldn't have chain line issues.

Also - i note that a double on long chainstays should be possible using a fat bike direct mount front mech adaptor - in your experiance is it of any benifit or just added complication for no real benifit- in an ideal world i want the bike to be ridable as a "heavy" regular bike - ergo low gears - but with the ability to kick power in if required - and i guess i dont want to be stressing the motor undually - if i can let it keep RPM up with lower gears then that has to be good - although ill go slower ill be able to haul the house behind me .

I guess im limited to ring size by the motor drive unit on the inside of the ring ?

Apologies if im asking daft questions but i cant get good internet ATM as im on an floating barge off coast of australia

 

[D8ve]

You can get spider adaptors to fit a variety of front rings.
I don't know the full range available.
You could increase the range with a rear hub gear. Rohloff is probibaly outside the money you have but what about others the nuvinci hub I'd 360% I believe. I use the alfine 8 with about 300% range, it cost under £200 as a complete wheel. The savings come on cassette replacement and single speed chain pricing.

 

[top drive]

i actually have a rohloff in the garage...... its on another bike currently - thats not to say it cannot be repurposed but its awesome on my winter mtb at the moment

my old commuter had an alfine - we didnt get on well. Very draggy.

 

[D8ve]

Oh oh oh repurpose it my way please

I have set the gears so 15-18 is nice in 5th for efficiency reasons.

 

[top drive]

they aint all that .

Lives on my winter bike as in winter the drag is negligible but on my race bike it was hellish . going back to xtr 3x9 was like adding a turbo boost.

 

[anotherkiwi]

... in an ideal world i want the bike to be ridable as a "heavy" regular bike - ergo low gears - but with the ability to kick power in if required - and i guess i dont want to be stressing the motor undually - if i can let it keep RPM up with lower gears then that has to be good - although ill go slower ill be able to haul the house behind me .

Missing word in front of heavy "very". Day before yesterday I went to the supermarket and back with no battery (end of charge 200 meters from home on the way out). 7 km with a 25 kg bike and 46:28 on the steep bits made me run off and order a 12-32 cassette at the LBS as soon as I got home. And I have very strong legs despite my age

Not quite as bad as riding a Vélosolex without motor (single speed 38 kg) but a 10 speed 11-42 would be handy on a heavy bike and never running out of juice an even better idea.

 

[top drive]

i do alot of bike packing - often on

9zero7 3.8 inch tired rohloffed fat bike. ive ridden this 200kms through the cairngorms (blair atholl - Gaick pass -laraig au lough - linn off dee - glenfeshie - aviemore)

Itll have to be a fair effort to be harder than that

I really want something i can ride as a regular bike for the 4 flat miles on the cycleway and then just use power for the 2 big climbs.

 

[top drive]

Phase 1 complete.

The thorn frame was no good. The chainstays were too short so plan b is to build it up on an old inbred summer season i had in the garage roof. Get it working then ill transfer it over to a.nOther steel frame of the medium persuasion for the wife to be able to use it also.

Went to order my motor and battery. I swear dillinger have pumped up there prices not insignificantly since i last looked. No doubt to do withh the pound crashing. (Had i known id have picked up a motor from dillinger in oz before i flew home last week)

• Are there any other reputable companies using samsung or panasonic hi discharge cells in their batteries and offer decent customer service

• Realistically what sort of range can i expect from an 11.4ah or 14ah battery riding it as a cyclist as oppose to on the throttle aiming to have assist to the legal 15mph limit as oppose to illigally powering everywhere as per youtube videos. Unloaded as it stands without the motor kit or brakes its 36lbs. I reckon itll be in the 55 region once built up with motor and single battery ready to roll.

• For the cost of a 14 ah panasonic battery i can get 2 x11.4ah samsungs ..... Ie buy one and if its not enough i buy another later...... Any disadvantage to this over buying the 14ah ?

 

[top drive]

Bouncing around here i see e3emv mentioned alot.....
No mention of what cells he uses though. His prices seem too good for them to be branded cells.......

Any experiance/thoughts.?

 

[anotherkiwi]

• For the cost of a 14 ah panasonic battery i can get 2 x11.4ah samsungs ..... Ie buy one and if its not enough i buy another later...... Any disadvantage to this over buying the 14ah ?

You would be silly to not buy 22.8 Ah for the same price as 14 Ah with quality cells inside.

 

[Nealh]

Bouncing around here i see e3emv mentioned alot.....
No mention of what cells he uses though. His prices seem too good for them to be branded cells.......

Any experiance/thoughts.?

Paul aka Cellman @Em3ev is well regarded over on ES and by all accounts is a top bloke, he specialises in BBS and batteries. I don't think you will find he sells unbranded cells as he puts his good reputation on the line, his CS is good.

 

[top drive]

That's fair.

My statement was based on his bafang bbshd and a 22ah battery (more battery than I'll even need) including postage and duties in the UK is only 100 quid more than a bbshd and 14ah battery.....

How ever as you say he has many satisfied customers.

 

[Nealh]

That's fair.

My statement was based on his bafang bbshd and a 22ah battery (more battery than I'll even need) including postage and duties in the UK is only 100 quid more than a bbshd and 14ah battery.....

How ever as you say he has many satisfied customers.

Em3ev cells used are all Samsung, I think you get the option of which cells you want to suit your needs including the newer 3c rated ones for higher amp draw. With 1kw you may well might need 22ah esp if you want 50 mile range.or speedy riding.

 

[anotherkiwi]

That's fair.

My statement was based on his bafang bbshd and a 22ah battery (more battery than I'll even need) including postage and duties in the UK is only 100 quid more than a bbshd and 14ah battery.....

How ever as you say he has many satisfied customers.

Rule number one: there is no such thing as too much battery!

And as @Nealh said if you are drawing 18-20 Amps from the battery it is going to be kinder on a 22 Amp one than on a 10 Amp one which will wear out much faster (less charge cycles) even if it is rated for 2C (2 x Amp rating)