Carbon Road mtb Bike Seatpost 27.2mm 31.6mm

Two different type of carbon seatposts had sold a lot recent years.
SP003 and SP225 are full carbon fiber seatpost for road bike and mtb bike.
Both of this seatpost comes in two dia. 27.2 mm and 31.6 mm which is compatible for all of bikes.

The diversity between this two types of seat post is number of bolts on the top.
In location where we mount our saddle rails, you can see two bolts and single bolts models.

Which is good ?

We feel SP225 has more style in current aero seatpost trends. Other then that this two pattern
carbon fiber seatpost is passed EN testing, save for bicycle merchandise.