Big wheel 2.0

[AussieJester]

Nice build...I can help with the crank problem...What you need to make and/or buy is called a freewheel crank. It has a freewheel (as per used on rear hubs) incorporated into the crank so the chainring can spin freely, a second
ring is attached to this for electric power the original chain remains for chain to connect to rear wheel sprocket. Sickbikes.com sell the Cyclone freewheel crank, you can also buy what is called a 'trials crank' used obviously on trials bicycles that are freewheeling cranks but they are very expensive. I have made a ghetto freewheel crank for my brothers motoredbike it works well and is still going strong after 12 or so months of riding...

Best of luck

EDIT: TIP you can use a European bottom bracket bearing cup for a DIY setup, these bearing cups are threaded with same size/pitch thread as the freewheels, find a metal crank and weld one of these cups on spin on a freewheel attached a pair of sprockets and your in business.. (make sure you get the right side bearing cup the left side has a reverse thread ie. left hand thread VERY handy for SouthPaw freewheels if you wish to make a dual drive having left side of rear hub driven by a motor

KiM

[Fireproof]

You were asking about double-knurled apes in the "Easy Rider" post. These are the ones I put on my daughter's O.C.C. Schwinn . . . http://www.xyzbike.com/catalog/chopper- ... p-177.html

Keep up the good work on your trike!

[rick74304]

Kim, thanks for the heads up on the special crank, i'm not 100% sure I follow how to build one, but I know how to spend $ lol

Fireproof, thanks much for the apes link, might be just what I need!

So, I guess it's time to post the re-build pics, here ya go;
Everything spread out and ready to go;

Get going already!



Now we're getting somewhere;

The final product!

How it works is pretty straight up, get some forward momentum, lift up on either handle, twist the handlebars and spin!
We've found that leaning away from the slide helps keep things shiny side up, 180 and 270 degree spins are dead easy,
the full 360 takes timing with the handlebars.
If you look at the pic of the back of the trike, the bogie wheels are easy to remove and install no tools needed;
just remove the 2 tensioning springs, turn the trike on its side, slip the rack out of the dropouts, and twist.


Finished thread with spin videos here;
http://ratrodbikes.com/forum/viewtopic.php?f=38&t=22242

If there was anything i'd change, its the fact that I mocked up using the choppers original 24 inch front rim, like the bonehead
that I am, I figured it was the same size as the 26 inch disc brake rim I was going to use. This caused me a few headaches, and
a few design changes. I replaced and relocated the dropouts, and had to curve the bogie arms with a series of pie cuts and welds,
just to get the lift mechanism to work reliably, which it now does. The frame is a little higher in the front now thanks to the bigger rim,
where ideally i'd have had it parallel to the ground. Oh well, all stuff to remember for next time !
Rick

[nutsnbolts]

man i could use one of those rear ends,nice job

[AussieJester]

Kim, thanks for the heads up on the special crank, i'm not 100% sure I follow how to build one, but I know how to spend $ lol

In a nut shell... the crank (with sprocket on it) needs to be able to 'freewheel' ..JUST the sprocket not the axle, that
MUST be made 'independent' of the sprocket.

The 'ghetto' way to do this is attach (weld usually) are standard rear freewhell to a crank arm and then bolt
a front sprocket to this freewhell so it can ..well..freewheel. So now when you put the crank arm on the axle
you can spin this sprocket (forward) To this freewheeling sprocket, you bolt (with spacers in between)
a second sprocket of same or similar size depending on the sizeof your electric motor ... So now, you have TWO
sprockets side by side that can freewheel. ONE of the sprockets with have the chain running to the rear wheel hub
the second (usually the inner sprocket) will have the chain running to your electric motor. When the motor spins up
it thus turns BOTH front sprockets (and thus the rear wheel) while your crank arm remains 'motionless'
You can pedal if you wish or not, either way the motor doesnt son the crank arm JUST the sprocket.

As i said though, if you cant manage it you can buy the freewheel cranks from Sickbikes pretty cheap

KiM

[kingfish254]

Love the wipeout videos and the trike.