FatCogs Community Discussion Forums

Go Back   FatCogs Community Discussion Forums > Fat Chance Bicycles > General Fat Chance Discussion

General Fat Chance Discussion Anything and everything about the best mountain bikes ever made.

Reply
 
Thread Tools Search this Thread Display Modes
Old February 7th, 2011, 4:54 PM   #1
jonsonneborn
Senior Member
 
jonsonneborn's Avatar
 
Join Date: November 17th, 2009
Location: San Rafael, Ca
Posts: 317
Default Should I add disc brake tab to Yo Eddy?

My 1990 Yo Eddy is due for a powdercoat. Since the frame has already been repaired and I don't have alot invested in it, I was thinking about having a local frame builder (Bernie Mikkesen) custom make and weld on a disc brake tab (he quoted me $200).

Some questions and potential downsides are:


The cable routing is not correct for a rear disc brake; perhaps i'd have Bernie add some braze-on cable guides? Anyone have a good solution here?

I would still have cantilever spots although i could remove the posts

Would the rear drop-out spacing support a hub with disc?

For the front fork i'd convert my Judy to a Sid fork with discs

Obviously this frame was never designed to have the stress of a disc brake in this location; any forseeable problem here?

If i end up going through with this I will photograph and post the results.
__________________
'87 Kicker, '88 Wicked, '89 Team Comp, '89 Wicked, '90 Yo Eddy, '92 Monster, '94 Yo Eddy,'97 Yo Betty, '97 Chris Chance Road Bike '99 Yo Eddy
jonsonneborn is offline   Reply With Quote
Old February 7th, 2011, 5:04 PM   #2
clockworkgazz
Member
 
clockworkgazz's Avatar
 
Join Date: August 26th, 2009
Location: scotland
Posts: 92
Default

pm Dr S on here as he did this with a Yo last year, very nice job to so see no problem in doing this.

http://www.retrobike.co.uk/forum/viewtopic.php?t=125004
clockworkgazz is offline   Reply With Quote
Old February 7th, 2011, 5:38 PM   #3
jonsonneborn
Senior Member
 
jonsonneborn's Avatar
 
Join Date: November 17th, 2009
Location: San Rafael, Ca
Posts: 317
Default

Quote:
Originally Posted by clockworkgazz View Post
pm Dr S on here as he did this with a Yo last year, very nice job to so see no problem in doing this.

http://www.retrobike.co.uk/forum/viewtopic.php?t=125004

Wow, he did a nice job on this! Removed the Canti mounts, removed 1 of the 3 cable guides from the right side of the top tube and added some braz-ons to the left side to route the hydraulic lines. It looks like he also beefed up the drop out to support the additional stress of the brakes in this area. This is exactly what I want to do with mine. Thanks for the link. I have IM'd Dr S for more info. Cheers, Jon
__________________
'87 Kicker, '88 Wicked, '89 Team Comp, '89 Wicked, '90 Yo Eddy, '92 Monster, '94 Yo Eddy,'97 Yo Betty, '97 Chris Chance Road Bike '99 Yo Eddy
jonsonneborn is offline   Reply With Quote
Old February 7th, 2011, 8:12 PM   #4
chainline
Senior Member
 
chainline's Avatar
 
Join Date: February 12th, 2010
Location: laconia
Posts: 301
Default

also look at the yo's i have in my albums We have had disc tabs done on both with the studs removed
chainline is offline   Reply With Quote
Old February 7th, 2011, 9:11 PM   #5
terrafirma
New Member
 
Join Date: June 13th, 2010
Location: Moscow, ID
Posts: 9
Default

Chris Igleheart welded a tab on my Kona P2 1" threadless steel fork for $50. The fork went on my early IF.
terrafirma is offline   Reply With Quote
Old February 8th, 2011, 3:11 AM   #6
Dr S
Member
 
Dr S's Avatar
 
Join Date: May 23rd, 2008
Location: northumberland, uk
Posts: 97
Default

No problems with my Yo after 9 months of use. It has just been stipped and rebuilt after a seasons riding and there is no sign of any structural problems around the disc mount or stays. It is a pretty straightforward procedure that any good frame builder can do. One thing though- due to the bullet stays and the way they sit outboard of the line of the dropout, not all 'off the shelf' disc mounts will work. Mine was custom cut on a water jet cutter to my own spec. It needs to be longer, and tapered, to be able to braze onto the rear side of the tube, thus providing a larger joining area one fitted.
If using a SID, i would recommend using a later 100mm fork as they only work well when sagged by around 30%. if you dial that much sag into a 80mm SID you will end up with very little usable travel. Using a sagged 100mm fork on a Yo is fine as long as it is a later suss corrected frame, using one on an earlier frame might affect low speed handling and turn in.
When selecting a fork I looked into several differing fork options and concluded that the 2000-2001 100mm SID Hydra-Air would be the better option for this project. Finding a one inch steerer SID is not easy though. But this is another advantage. By removing the crown and steerer on a SID and replacing it with the bolt on crown and steerer from a mid 90's Judy DH you lessen the rake and offset of the fork. Coupled with a shorter stem, you quickly regain the low to mid handling characteristics that Yos are celebrated for.
With a little basic engineering and math you can easily overcome the negatives associated with fitting a longer fork to a frame that was designed around a shorter item. I love the handling of my Yo now as much as i did before the modifications. It is much more comfortable and there is a vast improvement in front end grip over rougher surfaces.

As a final note, i would never condone defacing a good Fat Chance frame by adding discs and guides etc. But as my frame was just about fit for the trash can, I feel I was justified in making the mods, trying out the theory and giving it a new lease of life.
Dr S is offline   Reply With Quote
Old February 8th, 2011, 6:05 PM   #7
jonsonneborn
Senior Member
 
jonsonneborn's Avatar
 
Join Date: November 17th, 2009
Location: San Rafael, Ca
Posts: 317
Default

Quote:
Originally Posted by Dr S View Post
Using a sagged 100mm fork on a Yo is fine as long as it is a later suss corrected frame, using one on an earlier frame might affect low speed handling and turn in.
that
Since my frame is a 1990 and not suspension corrected I decided to bail on the whole disc brake project. Thanks for your nice write-up Dr. S I really enjoyed seeing pictures of your '94 Yo with Discs. I am going to stick with Cantilever brakes and send my frame and Judy lowers off for powedercoat. I did a little research on brakes and decided to order a set of the Avid Ultimate Black Ops V-brake calipers with sealed cartridge bearing and revearsable cable loop. Ideally I would have liked to go disc but the cost would have been alot considering the cost of brakes, new wheels, a SID donor fork & at least $200-$300 to have the frame modified. My Judy with England Air seems perfect right now and I didn't want to add to the front end height with a SID. Will post pics as I have them. Jon
__________________
'87 Kicker, '88 Wicked, '89 Team Comp, '89 Wicked, '90 Yo Eddy, '92 Monster, '94 Yo Eddy,'97 Yo Betty, '97 Chris Chance Road Bike '99 Yo Eddy
jonsonneborn is offline   Reply With Quote
Old February 9th, 2011, 8:46 AM   #8
ameybrook
Senior Member
 
Join Date: February 16th, 2007
Location: Durango, CO USA
Posts: 167
Default

My 98 with disc addition is currently my main hardtail. Such a great riding bike. I think you made the right choice passing on adding a disc to your 90. Some bikes were meant to be kept as is.

ameybrook is offline   Reply With Quote
Old February 9th, 2011, 9:07 AM   #9
yo-Nate-y
Global Moderator
 
yo-Nate-y's Avatar
 
Join Date: March 12th, 2009
Location: Tucson
Posts: 806
Default

Your Yo's a very nice way to update. Nice cranks too!

I agree about passing on disc'ing the '90, unless you were going to stay rigid, it seems like the wrong platform.
yo-Nate-y is offline   Reply With Quote
Old February 9th, 2011, 1:41 PM   #10
fat66
Member
 
Join Date: July 3rd, 2007
Location: flagstaff az
Posts: 61
Default

Quote:
Originally Posted by ameybrook View Post
My 98 with disc addition is currently my main hardtail. Such a great riding bike. I think you made the right choice passing on adding a disc to your 90. Some bikes were meant to be kept as is.

That is a beautiful bike, did 3D do the work on the disc retro-fit? Or Norse Cycles? Paint or powder? Well Played Sir!
fat66 is offline   Reply With Quote
Old February 10th, 2011, 8:35 AM   #11
misterdangerpants
Member
 
misterdangerpants's Avatar
 
Join Date: April 11th, 2008
Location: massachusetts
Posts: 96
Default

Quote:
Originally Posted by ameybrook View Post
My 98 with disc addition is currently my main hardtail. Such a great riding bike. I think you made the right choice passing on adding a disc to your 90. Some bikes were meant to be kept as is.
Nice bike! You too, Dr S.! My 1994 Rhygin Ra is in queue to get disc tabs this spring (at Circle A Cycles). It was a difficult decision considering I've logged thousands of miles on this beauty and I recently had it repainted by Toby Stanton. Will it destroy such a fine example (and it is stunning if I might say so myself)? I don't think so. I think it's a testament of how well the bike was made to keep up with the times!
misterdangerpants is offline   Reply With Quote
Old February 10th, 2011, 5:10 PM   #12
WVEddy
Member
 
WVEddy's Avatar
 
Join Date: September 26th, 2009
Location: NC
Posts: 90
Default

Quote:
Originally Posted by ameybrook View Post
My 98 with disc addition is currently my main hardtail. Such a great riding bike. I think you made the right choice passing on adding a disc to your 90. Some bikes were meant to be kept as is.


This bike motivated my current rebuild (on month 9). I did not go disc though. I have way more problems with discs than i ever did with my magura rim brakes. all the dragging and bs it just not worth it. I have never had a rim brake try to cut off the end of my finger while tuning (keep your fingers away from a spinning disc!!!). plus brakes slow you down. going fast is way more fun. I went with the cane creek direct 5 brakes. lots of power, without the destruction of the historical value of my fat.
__________________
-- WV Eddy
If you love your FAT, ride it!
WVEddy is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 1:17 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.