double chain ring fixie?

[Yellow Fang]

Suppose I were to convert my road bike to a fixie with the use of a rear derailleur. Would I still be able to use the double chain ring, or would there be issues?

 

[skwerl]

you can't do that. a rear derailleur will casue the chain to suck when you apply any kind of back-pressure to the pedals. you'll most likely end up in a hedge

 

[skwerl]

if, for some reason, you need a two-speed fixed there is the option of fixing an old SA hub or using a Schlumpf mountain drive I guess.

I'm wondering why you'd want such a thing though.

 

[domtyler]

I would personally recomend that you simply go out and buy a fixie, either off the shelf or get one made up from a track frame. The result will be much more rewarding than something hashed together out of empty washing up liquid bottles and old fridge freezer parts.

 

[Yellow Fang]

Yeah, but where's the fun in that? I'm bored of my bike and want to do something to it.

Also, I read in another thread that it is not recommended to use a Sclumpf mountain drive on a fixed wheel as it would tend to unscrew itself.

Aren't those singulator mechanisms similar to derailleurs?

 

[Joe24]

You can use n old double chainset. You could even leave both rings on if you wanted. But if you wanted to takeone off you would either need to shorten the bolts or buy new shorter ones.
You could do a fixed gear(singlespeed) with a rear mech or a chain tensioner thingy. Or do what i think is called an 'urban' singlespeed. You pick the gear you like on your geared then just shorten the chain and either put a chain tug on or a rear mech set up so it stays in one place with no cable on i.
Why not get anold track/road frame with horizontal drops and convert that to fixed. Would be much more fun, and you will then have another bike?

 

[Dave Davenport]

Do you actually mean 'singlespeed' not 'fixie'?

 

[Yellow Fang]

Fixie, although probably both, as I would probably go for a flip-flop hub.

 

[domtyler]

Yeah, but where's the fun in that? I'm bored of my bike and want to do something to it.

Also, I read in another thread that it is not recommended to use a Sclumpf mountain drive on a fixed wheel as it would tend to unscrew itself.

Aren't those singulator mechanisms similar to derailleurs?

Fair enough, if you get your fun out of the building and not the riding I guess!

 

[Dave Davenport]

Fixie, although probably both, as I would probably go for a flip-flop hub.

You can't run a fixed with any sort of sprung chain tensioner, singlespeeds ok though.

 

[skwerl]

You can use n old double chainset. You could even leave both rings on if you wanted. But if you wanted to takeone off you would either need to shorten the bolts or buy new shorter ones.
You could do a fixed gear(singlespeed) with a rear mech or a chain tensioner thingy. Or do what i think is called an 'urban' singlespeed. You pick the gear you like on your geared then just shorten the chain and either put a chain tug on or a rear mech set up so it stays in one place with no cable on i.
Why not get anold track/road frame with horizontal drops and convert that to fixed. Would be much more fun, and you will then have another bike?

you can't make a fixed with a singulator/derailleur. Once the tension in the chain starts in the reverse direction, ie as soon as you stop accelerating, you'll get chain suck.
Try it and see
The only way you might get close to getting away with it is if you have something similar to a singulator that isn't spring loaded but locked in place. My idea was to mount a jockey wheel on a bracket fixed to the underside of the chain-stay, adjusting tension by sliding toward, away from the stay in the vertical plain.

 

[Riding in Circles]

Yeah, but where's the fun in that? I'm bored of my bike and want to do something to it.

Also, I read in another thread that it is not recommended to use a Sclumpf mountain drive on a fixed wheel as it would tend to unscrew itself.

Not if you use one with a torque arm.

 

[Joe24]

you can't make a fixed with a singulator/derailleur. Once the tension in the chain starts in the reverse direction, ie as soon as you stop accelerating, you'll get chain suck.
Try it and see
The only way you might get close to getting away with it is if you have something similar to a singulator that isn't spring loaded but locked in place. My idea was to mount a jockey wheel on a bracket fixed to the underside of the chain-stay, adjusting tension by sliding toward, away from the stay in the vertical plain.

No, i said to make an Urban Fixed/singlespeed with a chain tug. Please not: "You could do a fixed gear(singlespeed) with a rear mech or a chain tensioner thingy"
Singlespeed is really a fixed gear, only one gear. Fixed wheel is no freewheel. Or thats how i see it anyway.

 

[skwerl]

No, i said to make an Urban Fixed/singlespeed with a chain tug. Please not: "You could do a fixed gear(singlespeed) with a rear mech or a chain tensioner thingy"
Singlespeed is really a fixed gear, only one gear. Fixed wheel is no freewheel. Or thats how i see it anyway.

Fixed gear/Fixed wheel are the same thing=no freewheel

S/S=freewheel

 

[Joe24]

Alright then. I saw it differently.