seatpost

The Birdy, like most folders, has a long seatpost and stem.

The seat tube contains the seatpost of the bike, which connects to the saddle.

For another, the seatpost and handlebar stem, both of which are custom-fit, appear to be very long.

The two semicircles are held together with a bolt to attach the saddle to the seatpost.

Most saddles have two parallel rails that the seatpost clamps to.

Chiefs still lacked any form of rear suspension, though they did offer a spring-loaded seatpost.

The seatpost must be inserted at least a certain length; this is marked with a 'minimum insertion mark'.

The seatpost links the frame to the saddle.

Using this design the seatpost on a new frame must be cut precisely to fit the owner by a trained Giant dealer.

Alternatively, the hitch mechanism may rotate using the seatpost as the pivot.

Bottle cages may be mounted behind the seat with a bracket that attaches to the seatpost.

The disadvantage of this setup is that the seatpost height is not as adjustable.

One bolt tightens the clamp to the rest of the seatpost and to the saddle rails at the same time.

The saddle height is adjustable by changing how far the seatpost is inserted into the seat tube.

A black double sprung mattress type saddle was fitted to the 500 mm long 'L' shaped seatpost.

Usually have a relatively high seatpost, a narrow saddle, and a squared fork (used for one-footed tricks).

A style of rack clamps only to the seatpost, does not require eyelets or additional hardware, but has a limited capacity.

Shims are often available to adapt a too-small seatpost to a too-large seat tube.

The design made use of a folding seatpost and steerer tube and space-saving small wheels.

Quick-Release A no-tools closure that holds the wheels, and on some bikes, the seatpost.

The size of the seatpost is dependent upon the internal dimensions of the seat tube of the bicycle frame.

A hard slap on the seatpost pushes it forward and disengages a pin connecting the seat mast to the rear of the bike.

A trailer bike is attached to a bicycle at either the seatpost or on a special rear rack by a linkage that allows for pivoting.

Suspension may be implemented at the saddle either using a suspension saddle or a suspension seatpost.

Stoker handlebars are typically connected to a stoker stem that is clamped around the captain's seatpost.