Abstract: A wheel rim assembly includes a hub with a case and two flanges are formed on two ends of the case. Multiple spoke units are connected between the two flanges of the hub and the inner periphery of the rim. Each spoke unit includes a first connection member and the first end of an X-shaped spoke extends from the first connection member. Each first connection member includes a first recessed area and a second recessed area respectively defined in the outside and the inside thereof. The second recessed area is matched with the flange corresponding thereto. Each first connection member includes an engaging recess and a protrusion. The protrusion of one first connection member is engaged with the engaging recess of the next first connection member. Two covers are respectively connected two ends of the hub. The second end of each spoke is inserted into reception recess of the rim.

Abstract: A bicycle seat adjustment device includes a seat post having a support member which has a first slot. A groove is defined in each of two sides of the support member. A support seat has a curved top and two plates extend from the underside of the support seat. The support member is clamped between the two plates. Each plate has a protrusion which is slidably engaged with the groove corresponding thereto. Two bolts extend through the two plates and the first slot. A clamp unit is connected to the top of the support seat so as to clamp a seat. Two fixing bolts extend through the support seat and are connected to the clamp unit. The seat is horizontally adjusted by moving the support seat along the first slot, and angularly adjusted by moving the support seat along the curved plates and the curved top of the support seat.