Since our bikes are shipped assembled and packaged as-is, we cannot open the box, modify parts or accessories before we ship the bike to you. Bikes are shipped separately from the parts and accessories. If you would like a different color or seat model, you would need to purchase separately and install it yourself.
It is possible to put the S2 seat on an RX bike for example, and vice versa. The SG1 "Extended Seat" is not compatible with the S2 or RX models.
For ZG models, we cannot ship out different seat colors. Some of our community members have customized their seats on their own by adding a piece of fabric on top of the existing seat.