Racing Bike Seat

racing bike
A racing bicycle, commonly known as a road bike, is a bicycle designed for road cycling according to the rules of the Union Cycliste Internationale (UCI). The UCI rules were altered in 1934 to exclude recumbent bicycles.
(Racing bikes) Motorcycles designed for circuit or road racing, including mass-production motorcycles modified for motorcycle racing or sport riding.

seat
be able to seat; "The theater seats 2,000"
The roughly horizontal part of a chair, on which one's weight rests directly
A thing made or used for sitting on, such as a chair or stool
A sitting place for a passenger in a vehicle or for a member of an audience
show to a seat; assign a seat for; "The host seated me next to Mrs. Smith"
a space reserved for sitting (as in a theater or on a train or airplane); "he booked their seats in advance"; "he sat in someone else's place"