  A very promising spin physics programme will be soon on the way at the BNL
Relativistic Heavy Ion Collider (RHIC). By studying the spin asymmetries for
various processes (single photon, single-jet and $W^{\pm}$ production), we will
compare the different predictions obtained using some sets of polarized parton
distributions, available in the recent literature. We will put some emphasize
on the analysis of the anticipated errors, given the event rates expected from
this high luminosity new machine and the current acceptance for the detector
systems at RHIC.
