  The full parameter space of supergravity grand unified theory with $SU(5)$
type $p \rightarrow \bar{\nu} K$ proton decay is analysed using renormalization
group induced electroweak symmetry breaking under the restrictions that the
universal scalar mass $m_o$ and gluino mass are $\leq 1$ TeV (no extreme fine
tuning) and the Higgs triplet mass obeys $M_{H_3}/M_G < 10$. Future proton
decay experiments at SuperKamiokande or ICARUS can reach a sensitivity for the
$\bar{\nu} K$ mode of $(2-5) \times 10^{33}$ yr allowing a number of
predictions concerning the SUSY mass spectrum. Thus either the $p
\rightarrow\bar{\nu} K$ decay mode will be seen at these experiments or a
chargino of mass $m_{\tilde{W}} < 100$ GeV will exist and hence be observable
at LEP2. Further, if $(p \rightarrow \bar{\nu} K) > 1.5 \times 10^{33}$ yr,
then either the light Higgs has mass $m_h \leq 95$ GeV or $m_{\tilde{W}} \leq
100$ GeV i.e. either the light Higgs or the light chargino (or both) would be
observable at LEP2. Thus, the combination of future accelerator and future
underground experiments allow for strong experimental tests of this theory.
