not extension. This means that when a spring ceases to be under load and extends, it can extend past the equilibrium point. NoSno trucks NoSno trucks use two 'kingpin'-type bolts to create a floating pivot, an axle with a plate into which the bolts go, an angled base plate that attaches to the deck, and polyurethane bushings to dampen the turn. The amount of turn available in the trucks can be adjusted by tightening the bolts or by using bushings of different hardness. A similar design was adopted by Howla Mountainboards for the limited time that they manufactured boards. Bindings Bindings involve adjustable straps that hold the rider on to the board while allowing room to move their feet. Snowboard bindings Ratchet-strap bindings Velcro Bindings Bar-Bindings Heelstraps Wheels Wheels are made up of plastic or metal hubs and pneumatic tires ranging in size of 8–13 inches. The 8" wheel has evolved into the best choice for freestyle riding, and also an all purpose wheel for general riding. Larger wheels (generally 9" and 10") are more useful to the downhill rider; granting the rider access to high-speed runs and more stability when travelling at speed. Tyres Various tyres have been made available by different mountainboard manufacturers, giving riders a choice of tire specifications. For example, the thickness of the tyre is variable between tyres, usually either 2 or 4 ply. 2 ply tyres are lighter, but more susceptible to punctures than 4 ply tyres. There is a variety of tread patterns available, ranging from street slicks to deep tread designed for maximum grip with split center beads to channel water away. Width and diameter is also variable. Brakes Brakes are generally reserved for big mountain riding where riders need an increased ability to control their speed over long runs. The brakes are most usually attached to both front wheels of the mountainboard rather than the rear to give greater braking efficiency and reduce the chances of the rear wheels locking up and skidding. They are operated via a hand-held lever which when pulled causes both brake mechanisms to work simultaneously. There are four types of brakes used on mountainboards: Mechanical drum brakes Those brakes use brake drums attached to the wheel with the 5 wheel-screws (Scrub). They are cheap and brake rigidly but get extremely hot and tend to melt the plastic hub. Good emergency brakes only, not any good for