Notices
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)

Gyro

Old 06-17-09, 11:51 PM
  #1  
Large Member ;)
Thread Starter
 
Austin Rice's Avatar
 
Join Date: Oct 2008
Location: Costa Mesa, CA
Posts: 379

Bikes: I currently own a Giant Brass 1 dirt jumping bike. I love it. I bought it December 1st, 2008.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Gyro

Is it possible to put a gyro onto a fixie so that the bike will have a front brake and the ability to do barspins on? Thanks.

P.S. My head tube is 8.25" tall/long and 1" inside diameter. Takes a threaded fork. Thanks!
Austin Rice is offline  
Old 06-18-09, 01:29 AM
  #2  
META
 
Severian's Avatar
 
Join Date: Aug 2005
Location: Madison, WI
Posts: 945

Bikes: Gary Fisher Aquila (retired), Specialized Allez Sport (in parts), Cannondale R500, HP Velotechnic Street Machine, Dented Blue Fixed Gear (retired), Seven Tsunami SSFG, Specialized Stumpjumper Comp Hardtail (alloy version)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 3 Times in 1 Post
No, that's not how a gyro works. A gyro is designed for the rear wheel and with some sort of on-frame support for the cable housing.

Since you're using a threaded headset, and not a threadless bmx headset, you won't be able to have a front brake and do barspins. The topcap on a BMX headset is oversized and the bolt for that headset has a hole in the center through which you send your brake cable.

Also, good luck finding a straight-legged, threaded 1" fork with brake posts. And a fork with brakes (whether center-pull, or linear-pull, or even U-brake) won't be able to do barspins on a track, touring or road geometry bike.

in short... no.
Severian is offline  
Old 06-18-09, 05:53 AM
  #3  
aspiring dirtbag commuter
 
max-a-mill's Avatar
 
Join Date: Oct 2004
Location: philly
Posts: 2,123
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
i have seen a front brake cable routed though the steerertube. then you can spin to win!
max-a-mill is offline  
Old 06-18-09, 09:29 AM
  #4  
*
 
adriano's Avatar
 
Join Date: Nov 2008
Location: Baltimore
Posts: 6,876

Bikes: https://velospace.org/node/18951

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by max-a-mill
i have seen a front brake cable routed though the steerertube. then you can spin to win!
does anyone have pictures?
__________________

α
adriano is offline  
Old 06-18-09, 09:35 AM
  #5  
Senior Member
 
Thetank's Avatar
 
Join Date: Apr 2008
Posts: 1,041
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I thought this was about greek food!
Thetank is offline  
Old 06-18-09, 09:49 AM
  #6  
jpdesjar
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
same here
it's almost lunch time so i immediately thought food
 
Old 06-18-09, 09:57 AM
  #7  
*
 
adriano's Avatar
 
Join Date: Nov 2008
Location: Baltimore
Posts: 6,876

Bikes: https://velospace.org/node/18951

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
i prefer its middle eastern cousin.
__________________

α
adriano is offline  
Old 06-18-09, 09:59 AM
  #8  
jpdesjar
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
i could go for some falafel right about now
 
Old 06-18-09, 10:00 AM
  #9  
Team Beer
 
Cynikal's Avatar
 
Join Date: Apr 2004
Location: Sacramento CA
Posts: 6,338

Bikes: Too Many

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 113 Post(s)
Liked 157 Times in 103 Posts
^agreed
__________________
I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC
Cynikal is offline  
Old 06-18-09, 10:00 AM
  #10  
Senior Member
 
CliftonGK1's Avatar
 
Join Date: Jul 2006
Location: Columbus, OH
Posts: 11,375

Bikes: '08 Surly Cross-Check, 2011 Redline Conquest Pro, 2012 Spesh FSR Comp EVO, 2015 Trek Domane 6.2 disc

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 7 Times in 6 Posts
Originally Posted by Severian
Since you're using a threaded headset, and not a threadless bmx headset, you won't be able to have a front brake and do barspins. The topcap on a BMX headset is oversized and the bolt for that headset has a hole in the center through which you send your brake cable.

Also, good luck finding a straight-legged, threaded 1" fork with brake posts. And a fork with brakes (whether center-pull, or linear-pull, or even U-brake) won't be able to do barspins on a track, touring or road geometry bike.

in short... no.
I'll agree about the fork, but not the cable routing. Back in the mid 80s there were no threadless headsets, and that's when the Potts mod came about.
CliftonGK1 is offline  
Old 06-18-09, 10:12 AM
  #11  
We Ride, We Womp
 
The27jeenyus's Avatar
 
Join Date: Sep 2008
Location: Clarkston, Mi
Posts: 70

Bikes: Ritchey Pista

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts


not mine

Last edited by The27jeenyus; 06-18-09 at 11:10 AM.
The27jeenyus is offline  
Old 06-18-09, 11:39 AM
  #12  
Senior Member
 
Join Date: Apr 2005
Location: Victoria
Posts: 1,321
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 75 Post(s)
Liked 36 Times in 23 Posts
If you've got a threadless headset drilling a hole in the top cap and routing the cable through there also works. Pretty similar to the pics above, but with no special hardware required.
tashi is offline  
Old 06-18-09, 12:01 PM
  #13  
Senior Member
 
Join Date: Oct 2006
Posts: 307
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Probably also a 1 1/8 headset too. Wasn't the Milwaukee Cycles trick by also being sold with the option of a headset like the one pictured above?
veganwar is offline  
Old 06-18-09, 12:24 PM
  #14  
Senior Member
 
Join Date: Apr 2006
Posts: 279
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
You need the potts mod topcap, bolt and starnut for 1 1/8" period. You need an 80's ish BMX stem or potts mod bolt/wedge (unless your wedge is the same angle and thread) for 1" period. Any other advice is horse puckey. Any of which should be available through Ebay or Danscomp.com or albes.com.

A gyro CAN be used for rear brakes with minor modification.

To use either potts mod setup you will need to invert the cable attatchment points on the arms of your brake.

A 650c wheel may be needed to clear the frame...it will take some trial and error work but it isn't hard.
stewardmike03 is offline  

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.