What is this?

[Jpez]

Saw this on FB and I have no idea. Asked the poster and just got a cryptic “custom boost 83mm 53 mm chainline and other stuff.
I can see a cable. Is it some sort of second chainring or something? Is this a commmon thing and I live under a rock?

 

[creaky]

Truvativ HammerSchmidt.

 

[hifiandmtb]

SRAM HammerSchmidt.

https://www.bikemag.com/gear-features/matter/prelude-to-a-shift/

 

[Jpez]

Thanks. Just looked it up. Interesting stuff.

 

[Sethius]

Confused why they left the bashguard on. I quiet liked it, had it for a while. Frames really needed to be faced to get it work as best as possible. Did have abit of drag too, I'd reconsider it if there was a wireless option integrated into maguras wireless dropper remote. If you're intrigued look up vyros split chain ring system.
The BB was shit too, Isis on drive side with too small a bearing to cope..

 

[pink poodle]

Didn't it have a funky noise that put hope to the test?

 

[droenn]

2008! wow what was life even like back then with your crazy contraptions!

 

[pink poodle]

2008! wow what was life even like back then with your crazy contraptions!

Steam punk for bikes.

 

[schred]

Always intrigued by it, figured it's weight, complexity, cost and 1x killed it off.

 

[Zaf]

Removed by user

 

[moorey]

Hello little brother.

Took your time derailling....

 

[fatboyonabike]

Does anybody want to buy one?
I have one with a new BB leftover from a mothballed project!

 

[fatboyonabike]

Hello little brother.

with a Gates carbon drive...Noice!