Ghost Cog?
#2
Cat 6
Join Date: Dec 2007
Location: Mountain Brook, AL
Posts: 7,482
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 500 Post(s)
Liked 183 Times
in
118 Posts
Now that's HIP
__________________
72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff
72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff
#3
:)
Join Date: Nov 2006
Location: duluth
Posts: 3,391
Bikes: '07 Pista, '09 Fantom Cross Uno, '8? Miyata, '67 Stingray, '0? Zoo mod trials, Tallbike, Chopper, '73 Schwinn Collegiate, '67 Triumph Chopper, '69 CB350, '58 BSA Spitfire, '73 CB450
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Used quite often on tallbikes, dangerous when combined with a fixed wheel... or so I hear.
#7
Senior Member
Join Date: Oct 2005
Location: Blo-no, IL
Posts: 556
Bikes: 2005 Specialized Hardrock Sport, 1970's Miyata Liberty ala fixed gear
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
A sprung tensioner (such as a Single-ator) is a bad idea for fixed gears, braking would eliminate it from your bike. The ghost should work the same forward as it does backward. It's just a cog on an axle, mounted on the chainstay.
#9
Senior Member
Join Date: Nov 2004
Location: Davis CA
Posts: 3,959
Bikes: Surly Cross-Check, '85 Giant road bike (unrecogizable fixed-gear conversion
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 4 Times
in
3 Posts
I just went out in my garage to see if it works. It does. However, it takes only the slightest nudge to make it fall off. Did it ever fall off while riding. If so, what happened?
#10
Senior Member
Join Date: Sep 2007
Posts: 195
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
it's not mounted to anything. it just floats in there. if it falls out, then it needs to be bigger.
i've got one on a tallbike, cos the distance between the two frames/chainring and hub isn't adjustable. works like a dream. altho, it's hard to ride behind someone rocking one of these, cos it's like magic or something, and it's hard to not stare into the thing. it seems like it should fall out, or creep forward or backwards, but it works.
i've got one on a tallbike, cos the distance between the two frames/chainring and hub isn't adjustable. works like a dream. altho, it's hard to ride behind someone rocking one of these, cos it's like magic or something, and it's hard to not stare into the thing. it seems like it should fall out, or creep forward or backwards, but it works.
#11
superpredictable
Join Date: Nov 2007
Location: Madison, WI
Posts: 193
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Works for me. I've got a tallbike with 40x17 gear ratio, and a 40 ghost ring. Just barely fits in there without touching the cog or seat stay. Has never fallen out. I should mention that's it's a freewheel setup. I've ridden fixed setups with a ghost ring, and while safe (if done right), the play and the noise can be kind of annoying. Basically it's not the proper way to do things, but it will get you on the road.
#13
Sir Fallalot
Join Date: Jul 2006
Posts: 5,286
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 13 Times
in
11 Posts
Get a larger one, or push the one you have closer to the rear hub a few links. You gotta jam it in real good, if you know what I mean.
Last edited by wroomwroomoops; 03-09-08 at 04:01 AM.
#14
Senior Member
Join Date: Jan 2004
Posts: 619
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
If someone ever feels like being a dick and taking it out of the bike, you probably won't be able to ride until you find another one.
(And as someone who has had QR's flipped, and taillight brackets stolen, and brakes loosened, I know that some people really do feel like being dicks)
(And as someone who has had QR's flipped, and taillight brackets stolen, and brakes loosened, I know that some people really do feel like being dicks)
#15
Sir Fallalot
Join Date: Jul 2006
Posts: 5,286
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 13 Times
in
11 Posts
By the way, experimenting with a ghostring on a tight chain is a good way to have a finger or two severed, because you have twice the "engagement points", or should I call them "traps". Use caution, keep your fingers out.
#16
LF for the accentdeprived
Join Date: May 2005
Location: Budapest, Hungary
Posts: 3,549
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I used one for a while, too (as an attempt to tighten the chain on my vertical drop frame, and for laughs)... Sadly, it kept falling out. You need lotsa space within the chainstays so that you can jam in a large enough cog... and you also need a large enough cog, about 24-26t, preferably 1/8 if you run a 1/8 chain.
You have to jam it in real hard, as close to the cog as possible.
BTW, if someone steals it (unlikely) or it falls out and you don't put it back (more likely) you're not stranded. You just risk dropping your chain.
Edit: damn you, guys, now I'm thinking of mounting one again... only now i run a bigger cog so I probably can't (ghost ring would hit the chainstay)
You have to jam it in real hard, as close to the cog as possible.
BTW, if someone steals it (unlikely) or it falls out and you don't put it back (more likely) you're not stranded. You just risk dropping your chain.
Edit: damn you, guys, now I'm thinking of mounting one again... only now i run a bigger cog so I probably can't (ghost ring would hit the chainstay)
#17
Lanky Lass
it's not mounted to anything. it just floats in there. if it falls out, then it needs to be bigger.
i've got one on a tallbike, cos the distance between the two frames/chainring and hub isn't adjustable. works like a dream. altho, it's hard to ride behind someone rocking one of these, cos it's like magic or something, and it's hard to not stare into the thing. it seems like it should fall out, or creep forward or backwards, but it works.
i've got one on a tallbike, cos the distance between the two frames/chainring and hub isn't adjustable. works like a dream. altho, it's hard to ride behind someone rocking one of these, cos it's like magic or something, and it's hard to not stare into the thing. it seems like it should fall out, or creep forward or backwards, but it works.
East Hill
__________________
___________________________________________________
TRY EMPATHY & HAVE LOVE IN YOUR HEART, PERHAPS I'LL SEE YOU ON THE ROAD...
___________________________________________________
TRY EMPATHY & HAVE LOVE IN YOUR HEART, PERHAPS I'LL SEE YOU ON THE ROAD...
#18
Senior Member
Join Date: Nov 2007
Location: Quarantine
Posts: 238
Bikes: fixed gear raleigh super record, Fixed gear tall bike, SS tall bike, Triple high tall bike, Trek 4500, Diamond back viper, trek 800/nishiki chopper bike, I think/hope thats all
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I've done this many times on SS tallbikes. Works quite well for this application. I've also done it on a fixed gear once just so I could ride home on a bike with vertical dropouts. It worked but I wouldn't recommend it as a permanent solution on a fixed gear, but SS works just fine.
EDIT... the weirdest looking thing ever is to use a biopace as a ghost ring FREAKY!!!
EDIT... the weirdest looking thing ever is to use a biopace as a ghost ring FREAKY!!!
#20
Instigator at best
Join Date: Jan 2007
Location: Columbia, Missouri
Posts: 1,086
Bikes: Motobecane Jury
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Why not put that cog on a little axle, and mount the axle to a clamp on the chainstay? You wouldn't have to worry about it falling out, and you could adjust tension by sliding the clamp forwards and backwards.
#21
Look at all these buttons
Join Date: Oct 2007
Posts: 984
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Cuz d00d... then it wouldn't be ghetto. I mean... why not just buy a chain tensioner? Or run gears? there... I said it.
#22
:)
Join Date: Nov 2006
Location: duluth
Posts: 3,391
Bikes: '07 Pista, '09 Fantom Cross Uno, '8? Miyata, '67 Stingray, '0? Zoo mod trials, Tallbike, Chopper, '73 Schwinn Collegiate, '67 Triumph Chopper, '69 CB350, '58 BSA Spitfire, '73 CB450
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
As you move forward, the pressure would torque down on the chainstay and as you brake, it would torque up. I could see this destroying a bike very quickly.
#24
Guest
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
#25
Blue Light Special
Join Date: Sep 2006
Location: Bay Area, Sunny Cali
Posts: 1,467
Bikes: '05 Felt F55, Schwinn Prologue road bike, '86 Centurion DS Iron Man, Sette Flite AM MTB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Man I wish I had thought of this before selling that spare vertical dropout frame I had.
As for "jamming in the cog real tight" on vert dropout setups, why not remove the wheel, place the ghost cog in the chain and then squeeze the wheel back in the dropouts? (Or is that how ya'll do it now...)
As for "jamming in the cog real tight" on vert dropout setups, why not remove the wheel, place the ghost cog in the chain and then squeeze the wheel back in the dropouts? (Or is that how ya'll do it now...)