Track spikes, or just spikes, are a type of footwear featuring protruding spikes on the soles used by athletes when racing on the track. Some spikes are designed for longer-term training on tracks, but generally the shoes are used for racing. The term "spikes" can also refer to track shoes featuring such protrusions, though these are technically called pins. Spikes are similar to studs, which are used for team sports, although generally smaller and with a sharp point.
Track pin spikes
1924 Olympic 100 m champion Harold Abrahams wearing J.W. Fosters pioneering running spikes
Old running spikes for cinder tracks
Spike plate with spikes removed
Cleats or studs are protrusions on the sole of a shoe or on an external attachment to a shoe that provide additional traction on a soft or slippery surface. They can be conical or blade-like in shape and can be made of plastic, rubber or metal. The type worn depends on the environment of play: grass, ice, artificial turf, or other grounds.
Football boots have studs on their soles
"Etrusco Unico" boot model by Adidas (1990) with metal cleat on its sole
Metal baseball cleats produced by Under Armour
The bottom of a cycling shoe.