landings. Cross country spikes usually have no more than six spike points and are similar to distance spikes in many respects. However, given the wide range of terrain encountered off-track, cross country spikes have a more durable rubber sole and supportive mid-foot to provide a level of cushioning and stabilization not required on a track. Depending on race length, surface types and personal preference, cross country spikes may be abandoned in favor of racing flats. Shoes for field events and specialty events vary widely depending upon the specific requirements of each event. For example, long jump shoes are most similar to sprint spikes to provide good top speed, high jump shoes have flat bottoms and heel spikes to allow energy transfer through the entire foot, and steeplechase shoes are predominantly a water-resistant mesh for exceptional ventilation. While shoes for shot put, discus and hammer throw have flat rubber soles with no spikes, they may still occasionally be referred to as "track spikes." Notable spike manufacturers include Adidas, Asics, Brooks, Mizuno, New Balance, Nike, Puma AG, Reebok and Saucony. Types of spikes While most spikes are between 3/16 inch (5 mm) and 1/2 inch (12 mm) long, the most common is 1/4 inch (6 mm). Additionally, there are various specialty lengths, as well as minimal "blank" spikes (also called studs) used to cover a spike well. Spikes are generally metal or ceramic and come in three main types: the pyramid, the needle (pin), and the compression tier (Christmas tree). Pyramids are conical spikes that taper to a sharp point. They normally have a maximum diameter nearly equal to the diameter of the threads of the spike. Needles also have a sharp point, but a thinner cone diameter. Track spikes create traction by penetrating the track surface. Some tracks do not allow pin spikes and limit the length of pyramid spikes to minimize damage to the track. A variation for synthetic tracks is the Christmas Tree spike. It uses a terraced cone shape with a flat end designed to compress rather than penetrate the track below it. However, the notion that the compression spikes have less track penetration is not supported by scientific studies. Lastly, there are Tartan spikes that are dull that are most commonly used for rubber tracks. See also Racing flats Cleat (shoe) Comparison of orthotics Starting blocks References Athletic shoes Sport of athletics equipment Sport of athletics terminology