Bicycle seat assembly

1. A bicycle comprising:

a bicycle seat and a bicycle seat post;

a mounting platform comprising, on a lower portion thereof, one or more bicycle seat post attachment members attached to said bicycle seat post with a first clamping means; and

wherein said bicycle seat is affixed to said mounting platform with a second clamping means which is independent and separate from said first clamping means, said second clamping means comprising a quick release locking mechanism, including and operated by, a quick release fastener which comprises a lever that has a cam that pivots about a pivot, wherein said lever is attached to a bolt, which is assembled to a locking lug arranged to move and lock against a locking surface formed in said bicycle seat; and

wherein said mounting platform comprises a receiving member for receiving thereon a portion of said bicycle seat, said receiving member defining at least one upwardly concave surface formed on an upper portion of said mounting platform, said at least one upwardly concave surface extending from a rear portion of said mounting platform to a front portion of said mounting platform, said rear portion extending above said portion of said bicycle seat and said front portion being lower than said rear portion and not extending above said portion of said bicycle seat.

2. The bicycle according to claim 1 , wherein said one or more bicycle seat post attachment members comprise a pair of rails attached to side extensions, and wherein said rails are clamped or otherwise attached to clamp members of said bicycle seat post.

3. The bicycle according to claim 1 , wherein said bicycle seat comprises a locking assembly.

4. The bicycle according to claim 3 , wherein said locking assembly comprises a plurality of locking members, which are pivotally connected to one another by pivot links.

5. The bicycle according to claim 2 , wherein said at least one upwardly concave surface comprises two upwardly concave surfaces each of which is opposite one of said rails.

6. The bicycle according to claim 5 , wherein said front portion of said mounting platform comprises a central protrusion positioned between, and extending above, said two upwardly concave surfaces and configured to abut against said portion of said bicycle seat.

7. A bicycle accessory for a bicycle that includes a bicycle seat and a bicycle seat post, said bicycle accessory comprising:

a mounting platform comprising, on a lower portion thereof, one or more bicycle seat post attachment members attachable to said bicycle seat post with a first clamping means;

a second clamping means which is independent and separate from said first clamping means, said second clamping means comprising a quick release locking mechanism, including and operated by, a quick release fastener which comprises a lever that has a cam that pivots about a pivot, wherein said lever is attached to a bolt, which is assembled to a locking lug arranged to move and lock against a locking surface formed in said bicycle seat; and

wherein said mounting platform comprises a receiving member for receiving thereon a portion of said bicycle seat, said receiving member defining at least one upwardly concave surface formed on an upper portion of said mounting platform, said at least one upwardly concave surface extending from a rear portion of said mounting platform to a front portion of said mounting platform, said rear portion extending above said portion of said bicycle seat and said front portion being lower than said rear portion and not extending above said portion of said bicycle seat.

8. The bicycle accessory according to claim 7 , wherein said one or more bicycle seat post attachment members comprise a pair of rails attached to side extensions.

9. The bicycle accessory according to claim 8 , wherein said at least one upwardly concave surface comprises two upwardly concave surfaces each of which is opposite one of said rails.

10. The bicycle accessory according to claim 9 , wherein said front portion of said mounting platform comprises a central protrusion positioned between, and extending above, said two upwardly concave surfaces and configured to abut against said portion of said bicycle seat.