Selden Masts are the world's largest spar
maker and supply more race and championship winning mast than any other
manufacturer. They have applied all their experience and knowledge to
the Optimist product to deliver what we believe is the ultimate spar
Masts, boom and sprits are all produced from
7075T6 aluminium. This is not the case with other leading brands that
use 5000 series welded tubes for booms. The tubes are first extruded and
then re-processed to produce spars to a precise tolerance with reduced
wall thickness. The booms and sprits are slightly larger in diameter but
our wall thickness is less resulting in a stiffer but lighter spar.
Selden then use purpose designed equipment
to bead peen the tubes, a process where the surface is blasted with
minute glass beads. This cleans the surface to improve the anodising
quality, improves fatigue resistance and provides the spars with the
durable sating Selden finish.
All tubes are hard anodised to 45 microns.
Holes for fittings are drilled before anodising to ensure ultimate