It has something to do with the distance from the kingpin to the hex hub... but I'm not sure...
I'm wondering about it's effect on steering. I'm using the original Xray T1 where the front pivot balls are very near the center of the contact patch of the front tires.
When the T1 first came out, people were saying that the steering is very aggressive.
Now that most people are using the C-Hubs, the general consensus is that the C-Hubs are better than the Pivot Balls.
Just wondering whether the tire scrub has anything to do with it.