  In this work we focus on various phenomenological aspects of the lightest
even tiers, (2,0) and (0,2), in models based on a Real Projective Plane in 6
dimensions. We discuss the spectrum of the levels due to loop corrections, and
the limit when the two radii are equal, in which case the two levels mix with
each other and a new basis is defined. We also discuss the dependence of the
spectrum on the ratio of the two radii. These results are essential to
understand the phenomenology of the model at colliders (LHC) and to predict the
relic abundance of Dark Matter. Finally, we estimate the bounds on the radius
from resonant decays of the even tiers at the LHC, showing that they can be in
the 600 GeV range after the complete analysis of the 2011 data.
