Oh my God, I'm so amazing!

Basically set up the drivetrain on the driveside, singlespeed, using a tensioner if need be, get that running sweetly,

THEN;

Setup another R/H side (driveside) crank arm, on the L/H side, running fixed but an easier ratio, therefore, you can run say 38/16 on the driveside, for a higher top end speed, and on the non-drive-side, you could run 38/13, so it is easier for you to hob skid, as there is less force on your legs,

Does not work.

how about higher gear ratio fixed on driveside
and a freewheel with lower gear ratio on non-driveside (it will be freewheeling when pedaling)
does it make it easier to skid?
just an idea

how about higher gear ratio fixed on driveside
and a freewheel with lower gear ratio on non-driveside (it will be freewheeling when pedaling)
does it make it easier to skid?
just an idea

swapping frome DSide to NDSide makes no difference. changing the ratio will just mean the fixed will be fixed and the freewheel will freewheel as the higher fixed gear will mean the axle will be turning faster than the cog on the freewheel so the pawls will not engage. change the ratios over and the axle will be wanting to rotate faster on the engaged pawl freewheel side while being held back by the fixed side, the result being a stripped freewheel/broken pawls/broken chain.

STOP THIS STUPID WANKY SHIT NOW IT DOESN'T FUCKING WORK YOU CUNTs.

and relax...

CALM DOWN

and relax....

?

STOP THIS STUPID WANKY SHIT NOW IT DOESN'T FUCKING WORK YOU CUNTs.

+1

How do you change between ratios ? - answer: you can't.

Ah! but if you put a coaster brake in there as well.....
Cheesecake, go on, build it

http://spencerwright.org/mybikes/doublechain.html

http://www.sheldonbrown.com/bichain-fixed-free.html

If your fixed has an easier ratio than the free, your bicycle will break. A freewheel allows the wheel to go faster than the cog, but not the other way round. The fixed will be pulling the wheel round at a low rotation, and the freewheel will be pulling the wheel round at a faster rotation, both attached to the same pair of cranks.

In short, you're fucked.

You'd have to make the fixed ratio higher than the free ratio, in which case as they say, you will have a fixed bike and not a free.

If one side is fixed, it's obviously irrelevent what else is on the other side. You will always have a fixed of a set gear ratio.

A freewheel on both sides is more interesting though. At first thought it could let you have a different "braking ratio" to your drive ratio. But I expect it doesnt work either.

I cant be bothered to read all the posts, but im guessing they mostly all describe how this is nt going to work - hehe..

If you meant to have two chains running simutaneously, that would not work because the chain would turn each crank arm at a different RPM.

Ie: you could never use the higher right side-freewheel ratio your talking about because the left hand drive is already linked to you pedalling RPM.

Plus you generally need a higher ratio for fixed as you need to pedal downhill, and a lower one for freewheel because you dont.

The double freewheel mentioned above sounds well interesting though.

Could certainly have some useful effects I think...

them wright brothers were nutters too.......fly like the birds!!! C R A Z Y.

http://www.sheldonbrown.com/bichain-fixed-free.html

This still looks fun

This still looks fun

...so now I have a working bike with 37" freewheel, 70" fixed and 94" fixed gears, all selectable with a single lever.

Mmmmm. . . why does that sound familiar ?

50/14 = 94"?

Shaun Wallace won the kilo National champs with a double drive setup, don't know how he achieved this or whether it was fixed or free....

there was a double freewheel bike with one reversed next to the normal freewheel and an idler that let the chain go round both, stop pedaling then pedal backwards to climb hills in an easier ratio.

I've seen a diagram of this setup and no matter how hard I studied it I still couldn't get my head around it! Supposedly it worked but the pedalling backwards bit was just too awkward, or something.

I think eggpie here on the forum has the book with the diagram...

Shaun Wallace won the kilo National champs with a double drive setup, don't know how he achieved this or whether it was fixed or free....

I tried to find info on this last time you mentioned it but couldn't. With this I'm assuming he has an easier ratio to start with that is shifted, shifts, whatever into a higher ratio for smashing out remainder of the kilo.

Surely this can't be done in a track kilo though as you're only allowed the one gear ratio?

The idea above would only work properly with two freewheels, one of them clicking in the opposite direction to the other. I'd assume also that this would require a customised hub. There would also presumably be an issue with getting even chain tension.

Sheldon Brown did something similar involving a Stermy Archer hub and a couple of fixed sprockets giving him three fixed gears. Seem to remember a note at the top of the article saying "if you have to ask questions about any of this, don't attempt it".

if you put two free wheels on a double fixed hub, both the conventional way round to work on the right hand side when you flip the wheel, your left hand side hub will now run backwards as you have flipped it over. so if you put a chain on both sides, when pedaling forwards the right hand side freewheel will engage and the left hand freewheel will clickety clickety free wheel (causing a bit of drag) if you pedal backwards or try and coast your right hand freewheel will not freewheel but the left hand one will now engage and give you drive in the reverse direction. no reason why you couldn't have different ratios on both sides but chain tension could be fun (although not that important because being freewheels you can use a chain tensioner on either side).

this would allow you to have a high forward gear and low reverse gear making for easy skidding/braking, you will also have a lot more weight and frictional losses to deal with.

IMHO it will work, but not very efficiently, and whatever you do while you are moving you have a bloody freewheel clicking away which would drive me insane!!!!

I tried to find info on this last time you mentioned it but couldn't. With this I'm assuming he has an easier ratio to start with that is shifted, shifts, whatever into a higher ratio for smashing out remainder of the kilo.

Surely this can't be done in a track kilo though as you're only allowed the one gear ratio?

I'm sure I heard how this was done but can't remember the exact details. I think it used 2 cogs on a flip flop style hub with no lock rings, the low starting gear fully tightened up on the normal non drive side connected to a tandem crank/right hand crank. On the standard drive side it had the higher gear not fully wound on. At the start the low gear would operate until the higher one fully wound onto the hub and engaged probably knocking the other one free which would unwind its self. I think this was the basic principle.

I tried to find info on this last time you mentioned it but couldn't. With this I'm assuming he has an easier ratio to start with that is shifted, shifts, whatever into a higher ratio for smashing out remainder of the kilo.

Surely this can't be done in a track kilo though as you're only allowed the one gear ratio?

Not actually true, at least it wasn't last time I checked, you are allowed to use gears if you are in a purely indivdual event, pretty much the only event where you can do this is the kilo (or 500m for women).

It's not often used, probably because most think that it's not worth the effort with mechanical problems, extra weight etc, you may as well just get good at starting.