View Single Post
Old 07-25-20, 01:04 PM
Senior Member
indyfabz's Avatar
Join Date: Jan 2010
Posts: 30,391
Mentioned: 199 Post(s)
Tagged: 1 Thread(s)
Quoted: 13357 Post(s)
Liked 6,027 Times in 3,094 Posts
Originally Posted by dsaul View Post
The second example is a correctly oriented dropout slot for a disc brake fork. It prevents the rotational force from the disc rotor from ejecting the axle from the slot under braking. The first example is normal for non-disc forks and is apparently still being used because that's the way it was always done in the past. Its not inherently dangerous with a properly secured QR, but forward facing dropouts are safer.

By the way, I build forks and the term used by all parts manufacturers for the pictured part is "dropout". The slot orientation has nothing to do with the fork axle offset, which is erroneously referred to as "trail" by many in the cycling industry. .
Very informative. Thank you.
indyfabz is offline  
Likes For indyfabz: