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


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

Reply
 
Thread Tools Search this Thread
Old 03-01-13, 01:52 AM   #1
Roadie607
Senior Member
Thread Starter
 
Roadie607's Avatar
 
Join Date: Jul 2012
Location: NY Metro
Bikes: 2010 Masi Gran Criterium, Motobecane ca. 1980 Grand Jubilee, 1984 Trek 500, Specialized Camber Comp 2014
Posts: 87
Long rake fork

Anyone know where you can get long rake forks? I mean as in 50-60mm range. Threaded steel seems to be an obvious prereq. Thanks!
Roadie607 is offline   Reply With Quote
Old 03-01-13, 10:45 AM   #2
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,086
Hire one built for you by a framebuilder.. you want low trail ? or a chopper effect ?

a build for you will want to have the frame to design around , to get the steering feel you wish for.
fietsbob is offline   Reply With Quote
Old 03-01-13, 10:51 PM   #3
Jeff Wills
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Bikes:
Posts: 7,890
Quote:
Originally Posted by Roadie607 View Post
Anyone know where you can get long rake forks? I mean as in 50-60mm range. Threaded steel seems to be an obvious prereq. Thanks!
Adding more rake without changing the head angle will result in less trail, which means a less stable bike. Is that what you want?

If you want to experiment, talk to a framebuilder. He'll have the tools and gauges to custom-build a fork.
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline   Reply With Quote
Old 03-02-13, 07:32 PM   #4
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,600
One of my favourite frame-builders, Dave Moulton wrote a couple of good articles on fork rake, trail and handling.

http://davesbikeblog.squarespace.com...f-history.html
http://davesbikeblog.squarespace.com...g-bicycle.html

Rake and trail are integrated with head-angle and wheelbase to determine a bike's handling. There's a strange criss-cross contradiction though. For any given frame & head-angle, as you increase fork-rake, trail decreases and the front-end gets more responsive and twitchier. However, increasing fork-rake also increases wheelbase. So you end up with a bike with a front-end that changes direction easily, but once it's leaned over in a turn, it doesn't want to carve as tight a line as before.

To rectify that oddity with a fork-rake change, I've removed head-tubes and milled the miter in the top & downtubes to increase the head-angle. This reduces the trail and wheelbase for quicker turn-in as well as steady-state cornering. No more Dr. Jekyll & Mr. Hyde handling.

Last edited by DannoXYZ; 03-02-13 at 07:38 PM.
DannoXYZ 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 09:01 PM.