Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-12-10, 10:48 PM   #1
Germanicus
Delusional Laserbrain
Thread Starter
 
Germanicus's Avatar
 
Join Date: Jul 2009
Location: South Orange, NJ
Bikes: 2008 Specialized Tricross, 1993 Giant Iguana rebuild w/ singlespeed drive train
Posts: 405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Has any body made a single speed triple?

Is it possible? I am talking about a triple crank and front derailleur with a single freewheel cog and no rear derailleur.

I have seen the opposite with a single chainring and rear cassette but never this configuration.
Germanicus is offline   Reply With Quote
Old 09-12-10, 11:10 PM   #2
Squirrelli
GONE~
 
Join Date: Apr 2010
Bikes:
Posts: 6,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't think it'll work.

Whacky chainlines are bound to happen.
Squirrelli is offline   Reply With Quote
Old 09-12-10, 11:16 PM   #3
StephenH
Uber Goober
 
StephenH's Avatar
 
Join Date: Sep 2007
Location: Dallas area, Texas
Bikes:
Posts: 11,227
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
I'd have to go fiddle with it and see. But generally, the rear derailleur also serves the purpose of chain-tensioner, whereas the front derailleur does not. So if there was some motivation to do so, you could design a front derailleur that also acted as chain tensioner, but a regular one wouldn't work. I think. Or you could use a rear chain tensioner that wasn't a derailleur.

The bigger question would be the point of it all.
__________________
"be careful this rando stuff is addictive and dan's the 'pusher'."
StephenH is offline   Reply With Quote
Old 09-12-10, 11:18 PM   #4
xkillemallx16
Senior Member
 
Join Date: Sep 2009
Location: im, hungary
Bikes:
Posts: 1,983
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
then it wouldnt be a singlespeed, amrite?
xkillemallx16 is offline   Reply With Quote
Old 09-12-10, 11:21 PM   #5
Squirrelli
GONE~
 
Join Date: Apr 2010
Bikes:
Posts: 6,757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Squirrelli is offline   Reply With Quote
Old 09-13-10, 01:31 AM   #6
jtgotsjets
Senior Member
 
Join Date: Oct 2004
Location: Toronto, Ontario
Bikes: Miele Azsora, Kuwahara Cascade
Posts: 1,749
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Do they make chain tensioners designed to take up variable amounts of slack? I figure most of them are designed for single speed applications—set it and forget it.

Seems like you'd probably end up running a rear derailleur anyway for that reason. Why not just get a 3 speed internal gear hub?
jtgotsjets is offline   Reply With Quote
Old 09-13-10, 04:33 AM   #7
Scrodzilla
There goes Tokyo
 
Scrodzilla's Avatar
 
Join Date: May 2009
Location: San Diego, CA
Bikes: EAI Bare Knuckle, 1975 Raleigh Pro Track
Posts: 26,474
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Quote:
Originally Posted by Vixtor View Post
I don't think it'll work.

Whacky chainlines are bound to happen.
No wackier than keeping a multi-speed bike in one mid range gear on the cassette and only switching gears up front. You'd definitely need a chain tensioner to take up the slack created when you shift to a smaller ring. It may work but you'd probably have better luck with double, though.
__________________
__________________________________
Scrodzilla is offline   Reply With Quote
Old 09-13-10, 08:19 AM   #8
NinetiesKid
Senior Member
 
NinetiesKid's Avatar
 
Join Date: Jul 2008
Location: Atlanta
Bikes:
Posts: 330
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't think the guy has a dérailleur, but there was someone on here with a double crank and a WI dos enos freewheel. Somehow he had enough room in the track ends to utilize all gear combinations without changing chain length. Try searching for that freewheel and you'll probably find the thread.
NinetiesKid is offline   Reply With Quote
Old 09-13-10, 12:03 PM   #9
fuji86
Senior Member
 
Join Date: May 2007
Location: Miami, FL
Bikes: 1986 Fuji Allegro 12 Spd; 1997 Fuji MX-200 21 Spd; 2010 Vilano SS/FG 46/16
Posts: 1,934
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The point of it would be to wind up with at least a 3 speed and having 17-20 gi amongst the choices for shift on the fly. Could make or break a more challenging hill climb ? White Industries has a SS/freewheel that has 2 different tooth count rear gears on it. That would give the cyclist about 8-10 gi difference in those 2 gear choices.

http://www.bikeman.com/WIND-FWDOSENO1719.html

Gonna need the chain tensioner anyway, but the freewheel concept would be more of a stop and change the chain from gear to gear (manual) solution rather than shifting on the fly while riding. Unless you can reach down with a tool and guide it over somehow without losing fingers ? Also could combine the ss freewheel with a dual or triple crank and get up to 6 gears out of it. Triples commonly have 30/42/52 tooth counts and duals 42/52. Don't know if the midrange of 42 is hard enough of a gear, as some fixies have 46 & 48T cranks.
fuji86 is offline   Reply With Quote
Old 09-13-10, 12:26 PM   #10
Hirohsima
Senior Member
 
Join Date: Jan 2007
Location: Sacramento
Bikes:
Posts: 1,013
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I run a DOS ENO FW and a road double. As long as you match the tooth count between the front and rear cogs (the sum of both being the same) the chain stays relatively the same length.

I run a 48/45 Front and a 16/19 Rear. I however have not swapped over to the lower gear in over a year so I would debate the usefullness. If I am doing hills, I ride my road bike nowdays.

If you did a triple-single, you could do a 48/45/42 and a 16/19/22 which would give you a pretty wide range, but at that point I would really just rather ride a gear'ed bike. I can't think of ANY time where I would need or want to get off my bike 3 times on a ride to adjust my chain and swap gears. I only did the DOS becuase there is a 7% grade near my office that I would never get up in on a 48/16. Never.

When swapping my own gears, my rear brake pads are just slightly off. I cannot comment on what a 3rd ring would do. Just make sure the pads are not hitting your tires.

I have a triple crank (with a single ring) on my Surly 1x1 and a Chris King SS rear hub which could allow you to run 3 gears in back... I just don't see the point.
Hirohsima is offline   Reply With Quote
Old 09-13-10, 12:39 PM   #11
vw addict
Senior Member
 
vw addict's Avatar
 
Join Date: Jan 2006
Location: East coast
Bikes: Specialized Tarmac Expert, Cannondale R700, Specialized Langster, Iron Horse Hollowpoint Team, Schwinn Homegrown
Posts: 2,673
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
This thread neither qualifies as single speed or fixed gear, so why? Go bother some other people with ill legit ideas.
vw addict is offline   Reply With Quote
Old 09-13-10, 01:40 PM   #12
dsh
Oh, you know...
 
dsh's Avatar
 
Join Date: May 2009
Location: DC
Bikes: '74 Schwinn Sports Tourer (Polo), S-Works E5 Team Festina (Chorus 11), Trek 2200 Bonded Carbon (Fixed), Trek 920 (7 speed IGH), Chesini Olimpiade SL (1x7)
Posts: 2,835
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've got an idea, i wonder if anyone has tried it:

Make a SS with a triple crank on the front and a FD, then throw an old RD on the back to act as a chain tensioner, but then instead of just the single rear cog throw a dingle on there so you have two in the back, or maybe even an old 5 speed thread on freewheel so you basically have 15 speeds on your SS

has anyone tried that??
dsh is offline   Reply With Quote
Old 09-13-10, 01:52 PM   #13
carleton
Elitist
 
carleton's Avatar
 
Join Date: Jul 2005
Location: Atlanta, GA
Bikes:
Posts: 13,066
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Quote:
Originally Posted by dsh View Post
I've got an idea, i wonder if anyone has tried it:

Make a SS with a triple crank on the front and a FD, then throw an old RD on the back to act as a chain tensioner, but then instead of just the single rear cog throw a dingle on there so you have two in the back, or maybe even an old 5 speed thread on freewheel so you basically have 15 speeds on your SS

has anyone tried that??
Next you are gonna suggest that some wizard create some sort of shifting device that allows one to traverse these "15 speeds" on the fly. Hahahahaha! Right. While we are wishing let's wish for 20, heck 22 speeds!

Keep wishin, buddy.
__________________
Quote:
Originally Posted by gtrob View Post
Roadies can run tempo all year as that's what humans were designed for. If you want to be a cheetah, lay around and lick your paws more.
carleton is offline   Reply With Quote
Old 09-13-10, 02:36 PM   #14
dsh
Oh, you know...
 
dsh's Avatar
 
Join Date: May 2009
Location: DC
Bikes: '74 Schwinn Sports Tourer (Polo), S-Works E5 Team Festina (Chorus 11), Trek 2200 Bonded Carbon (Fixed), Trek 920 (7 speed IGH), Chesini Olimpiade SL (1x7)
Posts: 2,835
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I was just gonna kick the chain with my foot, but your idea is pretty good too.
dsh is offline   Reply With Quote
Old 09-13-10, 03:07 PM   #15
wearyourtruth
Ride for Life
 
wearyourtruth's Avatar
 
Join Date: Jun 2004
Location: Baltimore
Bikes:
Posts: 2,729
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
it CAN be done, but you would still need both a front and rear derailler... so what's the point? it doesn't really simplify much, just limits you.
wearyourtruth is offline   Reply With Quote
Old 09-13-10, 08:27 PM   #16
Saddle Up
I Love My Dream
 
Join Date: Jan 2008
Bikes:
Posts: 1,076
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Paul Components Melvin tensioner allows you to use multiple chainrings up to 20 teeth apart in size. I've done it on a couple of bikes with two speeds, nothing would stop you from using a triple provided you don't exceed the 20 tooth difference.









It takes a few seconds to change gears, it's not intended to be shifted on the fly. One gear is for riding on the trail, the other gear is to ride on the road to get to the trail.

Last edited by Saddle Up; 09-13-10 at 08:30 PM.
Saddle Up is offline   Reply With Quote
Old 09-13-10, 11:55 PM   #17
Germanicus
Delusional Laserbrain
Thread Starter
 
Germanicus's Avatar
 
Join Date: Jul 2009
Location: South Orange, NJ
Bikes: 2008 Specialized Tricross, 1993 Giant Iguana rebuild w/ singlespeed drive train
Posts: 405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks guys,

I was just curious if it had been done.
Now that I see that last couple of images, I guess it would be a lot of work for a convoluted set up.
Germanicus is offline   Reply With Quote
Old 09-14-10, 01:28 AM   #18
jtgotsjets
Senior Member
 
Join Date: Oct 2004
Location: Toronto, Ontario
Bikes: Miele Azsora, Kuwahara Cascade
Posts: 1,749
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah, what you want is a good ol' sturmey archer AW hub.
jtgotsjets is offline   Reply With Quote
Old 09-14-10, 09:22 AM   #19
WoundedKnee
Antarctica awaits
 
WoundedKnee's Avatar
 
Join Date: Jun 2009
Location: Tucson, Zona
Bikes:
Posts: 1,965
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Saddle Up View Post
The Paul Components Melvin tensioner allows you to use multiple chainrings up to 20 teeth apart in size. I've done it on a couple of bikes with two speeds, nothing would stop you from using a triple provided you don't exceed the 20 tooth difference.


It takes a few seconds to change gears, it's not intended to be shifted on the fly. One gear is for riding on the trail, the other gear is to ride on the road to get to the trail.
Could you not take out a couple of links?

I am building up a bike with a double freewheel/double chainrings as we speak!
WoundedKnee is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 04:22 PM.