As simple as BMX bikes may seem, there’s a lot more going on than most people think, especially when it comes down to geometry! When it comes to a fork, a lot of people understand the basics that a shorter offset gives you more nose balance and a twitchier setup and a longer offset gives you more stability and a more balanced ride that’s more ideal for transitions and jumping. One thing most don’t consider is the trail and how that can affect the way your bike rides, too. Here’s a video where Brant Moore explains it all. This one doesn’t go super in-depth on the offset side of things, but it does help make a lot of sense as to what’s going on when you throw a fork on a frame with a mellower or steeper head tube angle.
“On the surface, the geometry of bmx forks appears very simple and this can be taken at face value. We all know that more offset is supposed to mean more stability and less offset is supposed to mean more front end control with less stability, but why is that?
Digging a little bit deeper shows that there is so much more to the geometry of a fork and the steering of a bicycle going on than meets the eye.
In this video, I talk about the geometry of not only bicycle forks, but also bicycle steering and the different aspects that affect it like steering axis, fork offset or rake, and trail.
George French Steering Geometry Article – G-Sport Website“