Strange hub drive system kit made by SRAM

[oigoi]

Just seen one of these on ebay, unusual looking system, only16.8V

SRAM Sparc Hub 16.8v 5 Speed 36H, ****ELECTRIC BIKE CONVERSION KIT**** | eBay

 

[shemozzle999]

It has been around a while, there is a members review:

http://www.pedelecs.co.uk/forum/electric-bicycles/508-sram-sparc-how-does-work-technically-two-motors-how-practical-use.html

Sparc technical details:

http://www.sram.com/_media/pdf/sram/manufacturers/2011 SRAM New Tech Specs GHS E Rev.A.pdf

 

[flecc]

And I'm sure discontinued now since SRAM are making a very different two speed hub motor now.

 

[shemozzle999]

New Ematic system:

http://www.sram.com/sram/search?keywords=hub+motor

http://cdn.sram.com/cdn/farfuture/1DMrSJy_oUrIfld8a1J9MILPpIPoJiN--tjugVF67Hw/mtime:1336149469/sites/default/files/techdocs/95-3015-000-000_rev_a_ematic_low_res_for_web.pdf

A couple of photos halfway down the page:

http://endless-sphere.com/forums/viewtopic.php?f=3&t=42538&start=30#p633173

 

[jerrysimon]

Hmm all very interesting. I wonder if that weight is incl battery ?

I have never come across these before

Jerry