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Minimalist Road bike- single front chainring?

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Minimalist Road bike- single front chainring?

Old 02-24-06, 02:53 PM
  #1  
niccolo
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Minimalist Road bike- single front chainring?

hey I was thinking is it possible to build a bike with one front chainring and say 5 or 6 speeds. alternately if this is possible, could you design it with a flip flop hub so it could be fixed on one side?

on my geared bike, i have the standard triple chainring. i only use a few of the gears for going to work and rolling around. if you could get by without the extra weight or maintenance of the front derailer and 2 chainrings, why wouldn't one want to? anyone else see the beauty of losing the 18 gears that are rarely used?
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Old 02-24-06, 02:57 PM
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I know people do this with a 3 speed and a single chainring.

However, I don't think the flipflop idea would work, or be practicale, because of the excess chain length needed to run through a derailleur.
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Old 02-24-06, 03:02 PM
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I always thought a Rohloff Speedhub would make an awesome tourer. Pretty minimalist look too.
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Old 02-24-06, 03:03 PM
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I used to have double chainring and front derailer on my road bike but since NYC is pretty flat i chucked the front derailer and extra chainring. I don't see how anyone in a city would need 24 gears!. i guess my bike is a minimalist road bike with only one downtube shifter.
i don't think flip flop would work because of the above mentioned problem.
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Old 02-24-06, 03:04 PM
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answers

1. you can drop the extra front ring if you want to.

2. the flip flop idea isn't going to work.

3. sometimes (not often, but sometimes) you end up having to keep the front derailleur on as a chainguide. don't throw it out until you know for sure that you don't need it.
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Old 02-24-06, 03:05 PM
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Definitely possible, though getting a flip-flop to work would be unlikely. lots of cyclocrossers run 1 x 8 or 1 X 9 setups, and that's for some rough on-and-offroad riding. My 1 X 8 works fine though I'm running a chainguard and one of those third-eye chainwatcher hooks on the seat tube to prevent chain drop on either end of the cassette.
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Old 02-24-06, 03:09 PM
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I'm running my MTB with a single chainring in front. I'm running Profile cranks so it was easy to get a 47.5mm chainline (middle ring). This roughly lines up with the middle of my rear cluster (9 speed) and I haven't had any problems with it throwing the chain off of the ring. I'm also running a Surly ring up front which isn't ramped at all so that may be a factor.
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Old 02-24-06, 03:14 PM
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Moved to Road.
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Old 02-24-06, 03:29 PM
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I have always though this was pretty cool. BTW has anybody actually seen one of these in person or better yet have one?

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Old 02-24-06, 03:39 PM
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On a triple, just run the ring mid spyder.
On my mtb thats 38-39T max because of the chainstay.
Then you gets yourself a 11T cog on the rear.
38 -11 is not a bad gear, mtb wheels that's 22mph @ 80rpm.

The problem is keeping the chain in the ring.
-Bash\pants guard outer\plate inner (if room.)
-A front derailer pushed down (looks bad\weight.)
-Tensioner (cost, looks, weight.)

I use a Dirtyparts Jack tensioner, lower pulley only.(40$ part, single ring only, non ESG bb mount system.)
Ground the teeth off the big ring as a guard.
This is intended for offroad and bunnyhops, no slap, shiftouts or chainjump.
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Old 02-24-06, 03:45 PM
  #11  
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I always thought it would be cool to weld a LeveL style cog mount onto the other side of a nexus 8 hub. The spacing could (somehow) be figured out, and youd have fixed/8sp instead of just fixed/free. Alternatively, you can take a milling tool to a SA AW to get a 2speed fixed.
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Old 02-24-06, 04:02 PM
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Often times I take this out when I don't feel like fussing with the shifters but simply feeling connected to the road....whatever that means, if you know what I mean...

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Old 02-24-06, 04:10 PM
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Originally Posted by yellowjeep
I have always though this was pretty cool. BTW has anybody actually seen one of these in person or better yet have one?

I ran this set up on my Merlin for a while. FSA Carbon crank with just the big ring and a 12-25 in the back, this was Dura Ace nine speed, and I think my longish chainstays made it work well as far as chainline. I never threw a chain no matter what the load or gear combo. It looked really clean and it puzzled guys at our local club races. They would always ask what I was going to do on the hilly part of the course.I would just say what do you mean?
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Old 02-24-06, 04:11 PM
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Originally Posted by The Fixer
Here's my silly looking fixed gear...(sic)
A front brake?!! On a fixie?!! Shame.

/actually, I really like that bike. Moreso for the chopped Brooks, but it looks like fun.
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Old 02-24-06, 04:18 PM
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Originally Posted by The Fixer
Often times I take this out when I don't feel like fussing with the shifters but simply feeling connected to the road....whatever that means, if you know what I mean...

That's nice looking. SS or fixed? Bet she's fast.
I know it's not that reduced, but getting rid of the front derailer works for me.
Mostly it's a noise issue, I like silent. Once I got the chain\rear derailer tensioned -I can hop off a kerb no chain slap\noise and hit the ground spinning.
Looks better I think, my frames seat tube flares at the bb shell join and I like it exposed.
Nicest part of the frame.
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Old 02-24-06, 04:20 PM
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Originally Posted by Mo'Phat
A front brake?!! On a fixie?!! Shame.
I know....sorry.....I'm a wus when it comes to that....
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Old 02-24-06, 04:52 PM
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I know two working messengers with single chainring geared bikes, one a 9spd rear the other a 10 spd rear, so yes, some people do it. As far as hills, well it has to be one damn steep hill to keep a strong rider from going up it with a 2:1 gear ratio.

REI.com sells a bike with a single chainring, and disk brakes I believe.
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