'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
What you are measuring is total length. Useful length for most seatposts requires the minimum insertion mark to be at or below the top of the seat tube so the useful length is total length minus about 60 to 75 mm. Another exception is the Thomson "Set Back" (i.e. bent) seatpost where the bend must be above the top of the seat tube.