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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 04-29-09, 01:14 PM   #1
commutr4life
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White Industries Dos Freewheel: Best idea? Or bad idea?

It's two cogs on a freewheel. Tempting because as I'm getting more used to ss riding I'm able to use higher gearing, and could switch over when I'm ready. But could it cause chainline problems? Thoughts?
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Old 04-29-09, 01:21 PM   #2
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Linky.

Seems fine to me ... I wouldn't use it though, kind of superfluous. If I were going to run more than one speed, I'd get a three-speed.
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Old 04-29-09, 01:23 PM   #3
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I like it. Haven't noticed any chainline problems yet.


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Old 04-29-09, 01:42 PM   #4
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No chainline problems, only chain tension problems.
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Old 04-29-09, 01:43 PM   #5
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Once you go slack, you never go back..
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Old 04-29-09, 01:47 PM   #6
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Linky.

Seems fine to me ... I wouldn't use it though, kind of superfluous. If I were going to run more than one speed, I'd get a three-speed.
It's not like you can shift between them. A White Industries freewheel costs $95, and the dos costs $120, so it's cheaper if you know your going to out grow the gearing...
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Old 04-29-09, 01:48 PM   #7
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What's wrong with a flip flop hub then?
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Old 04-29-09, 01:51 PM   #8
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It's a lot quicker to flip the QR skewer open, push the wheel forward, move the chain to the other cog, pull the wheel back, and flip the skewer closed.

It also sucks a whole lot less with a dirty/muddy/whatever wheel.
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Old 04-29-09, 01:56 PM   #9
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What's wrong with a flip flop hub then?
You would need two $95 freewheels instead of 1 $120 Dos.
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Old 04-29-09, 02:01 PM   #10
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Just seems unnecessary, but if you want it, I say why not?
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Old 04-29-09, 02:05 PM   #11
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I agree, not necessary...call me "dos-curious"
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Old 04-29-09, 02:13 PM   #12
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Just make sure you've got a 3/32" chain to go with it.
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Old 04-29-09, 02:13 PM   #13
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I run a double double (DOS ENO in the back, and a road crankset in the front). I currently run a 45/50 front and a 16/19 rear so things are not perfect as far as chain length right now, but I am working on correcting. As long as the tooth differential is the same between the F/R gears, the chain length stays the same and you have two VERY different gears to play with.

Here are some pics of my old setup.





And my current crankset setup:

Last edited by Hirohsima; 04-29-09 at 02:16 PM.
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Old 04-29-09, 02:32 PM   #14
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Fascinating...and both of you use QR? I thought that was a no no with ss, or is that just fg?
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Old 04-29-09, 02:34 PM   #15
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I haven't had any problems yet, even in the low 2:1 gear.
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Old 04-29-09, 03:20 PM   #16
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Fascinating...and both of you use QR? I thought that was a no no with ss, or is that just fg?
As long as you get a decent skewer it shouldn't be a problem.
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Old 04-29-09, 04:00 PM   #17
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As long as you get a decent skewer it shouldn't be a problem.
Yep, old Campy, Shimano, and Suntour closed cam QR's work great. You can't use aluminum exposed cam QR's (like Salsa Flipoffs for example), as they don't have enough clamping force and the knurling on the nuts can't hold like the steel of a good QR. Plus the Ti rod on mine never let me get enough clamping force (my guess is its slightly stretching when I use it). Aluminum QR's were designed for verticle dropouts.

I regularly climb hills on my SS, and no slippage. I clamp them pretty tight though, and I ran FG (with brakes) with no issues. I have zero idea or desire to skip or skid so can't comment on real FG riding.
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Old 04-30-09, 08:17 AM   #18
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Velo Orange brough in, or are bringing in, some tighter skewers. I've been thinking of doing if FG with with a Surly Dingle Cog.
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Old 04-30-09, 08:21 AM   #19
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get thee a tensioner, those surly ones are cool
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Old 04-30-09, 10:47 AM   #20
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For the road, I honestly don't see any reason for track nuts. They are a PITA, require a tool to remove, and they chew up dropouts. I rode for YEARs on horizontal dropouts on a geared bike and never had a QR slip. Other than stress from skiping/skidding, normal pedaling forces should not require anything more than a good quality steel QR.
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Old 04-30-09, 04:48 PM   #21
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Velo Orange brough in, or are bringing in, some tighter skewers. I've been thinking of doing if FG with with a Surly Dingle Cog.
I'm dying to see the 4-speed single speed.

Or, maybe thread a dingle onto an S3X and make a 6 speed fixed gear.
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Old 04-30-09, 06:01 PM   #22
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Sorry, but how is this a SS anymore? SS == 1 gear ratio. Not two, four, or any number but 1.
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Old 04-30-09, 06:23 PM   #23
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Yeah at that point I'd just get a bike with a casette and derailleur and have a bike that could shift to any of 8 rear cogs in a fraction of a second.
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Old 04-30-09, 07:14 PM   #24
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Sorry, but how is this a SS anymore? SS == 1 gear ratio. Not two, four, or any number but 1.
Do you consider bikes with flip flop hubs to be single speed?
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Old 04-30-09, 08:33 PM   #25
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I run a double double (DOS ENO in the back, and a road crankset in the front). I currently run a 45/50 front and a 16/19 rear so things are not perfect as far as chain length right now, but I am working on correcting. As long as the tooth differential is the same between the F/R gears, the chain length stays the same and you have two VERY different gears to play with.
I'd love to see pictures of the complete bike. Cool idea.
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