In this post, I argue it’s essentially the difference in stiffness between the rear and front truck that causes wheel-lift. A shorter axle makes wheel lift more probable by placing the possible axis of rotation (of the wheel-lift) closer to the middle of the board (and therefore the rider’s weight further out from that axis). However, balanced front-rear truck stiffness would make wheel lift impossible, by placing that axis entirely out of reach for the rider’s weight. Continue reading Skateboard physics: wheel lift
In this short post I look in more detail at the Tracker RTX Offset truck (which I believe has been discontinued). I discuss the reasons why I consider it a pointless exercise in truck design. Continue reading RTX Offset: axle intersects KP – why, Tracker?
Occasionally, people assert that TKP trucks (i.e., trucks with significant forward rake) turn “progressively,” while RKP trucks (i.e., trucks with minimal rake) turn more “linearly”. That, at first glance, can only mean that the trucks resist turning in such ways. In this post, I check for patterns in the way trucks resist when a rider leans on a skateboard. Continue reading Skateboard physics: squeezing bushings
In this entry I want to write down a couple of things that relate to a project that might or might not happen in the future. It’s an idea by a friend (whose handle is “Holden”), who already built a few two-spring trucks. His dream was (still is) to built a one-spring truck. Continue reading Skateboard physics: one-spring truck (and the dead-zone problem)
I’m skeptical about whether companies are indeed creating their own compounds. Their own molds and shapes, pigmentation and logos, sure. But don’t they still have to buy it in liquid form from somewhere?
So, I started a thread on a forum and I got into a rather interesting conversation with user Zip, which I reproduce here. Continue reading Polyurethane (PU) products and the industry
I examine a few things about bushings that keep coming up in skate forums:
Wheel-lift, Sizes, Shapes, Mixed duros, etc. Continue reading About bushings
Just for future reference, I measured the KP/PA angles of a few popular trucks. Here’s the results. Continue reading KP/PA angles