What's the name of that 2 speed crank kit . . .

[backpedaler]

What's the name of that 2 speed crank kit that mounts on the crank and gives you 2 gears? i think it was a 50s or early 60s gizmo


???

bendix eton ???

:?: :?: :?: :?: :?: :?: :?:

 

[UncleKudzu]

sounds like the TruVativ HammerSchmidit, though that's a very recent product. a two-speed crank with a planetary gear.

 

[aka_locojoe]

Was it "Rocket" something?

 

[StephenH]

Looks like Rocket Sprocket:
viewtopic.php?f=1&t=16682#p168803

In the 1970's, my brother got a 3-speed thingy that replaced the front sprocket on his bike. Someone used one on one of the bike buildoffs here, I believe. It had a small front front sprocket and big round case with the gears in it.

 

[user 135]

I remember somebody had one- thought it was ponytailmike. I think it is called a 2 speed Dyno crank.

Edit;; Found it 3 spd Dana transmission. Not what you are looking for but cool

 

[backpedaler]

cman - that's it! (thought it was 2 speed) A friend of mine found a bike with one on it. he's trying to deal on it today.

thanks!

(searched the patent number and see it was filed in 1971, issued in 1973)





here's all the pics i could find so far for everyone's reference . . .

 

[CCR]

RRB member "jon" has one on his RRBBO3 bike "Woody's pub and pool hall"

 

[bean]

There's also the Schlumph Mountain Drive and Speed Drive setups that you bang with your foot to change gears. The Pashley Guv'nor Plus 4 uses a similar type of BB with a Sachs Duomatic hub for 4 speeds with no cables. See the link for a video on how to change gears.

http://www.sheldonbrown.com/harris/schlumpf.html