Which bottom bracket to choose?

[myosis]

Hi,
i'm slowly edging my way to a better understanding of building bikes, now this might not be the best place to ask this but; i'm a little lost in bottom brackets.
i'm building a frame to support a battery of 15 cm wide!, it's quite a compact build and i need the peddles to be further apart than normal.

what is the simplest way of achieving this?
i have an image to illustrate what i want to achieve, the sizes may vary a little.

Cheers, tim

 

[nutnspecial]

This site is pretty handy for diy from scratch stuff http://custommotoredbicycles.com/wide_bicycle_pedal_crank_sets_for_clearing_4_stroke_motors68mm_bottom_bracket
I used their 6" sealed and it works great if you are ok with jis style. Also, with a little precision grinding jis can be shortened.

 

[crossbreak]

Truvativ Giga Pipe Team DH 100mm/148mm one should give you the q-factor you want...a very long BB will get ysou into trouble with correct chain line if you dont want to use an uber wide and expensive fatbike rear hub
https://www.bike-components.de/de/Truvativ/Giga-Pipe-Team-DH-Innenlager-p12343/schwarz-BSA-100x148-E-Type-o22320/

 

[Chalo]

i'm building a frame to support a battery of 15 cm wide!, it's quite a compact build and i need the peddles to be further apart than normal.

You don't need pedals ("peddles"); you need footpegs.

If you put the pedals that wide apart, the chain drive will be a disaster and you'll pedal like a comic duck-man.

You're not building a bicycle, but a motorcycle. Be honest with yourself, with your fellow road users, and with your locally applicable laws. Build the thing you want, register it, insure it, hold a license to operate it.

Or skip all that bull puckey and build a real electric bicycle that conforms to both the rules of the road and the rules of ergonomics.