I agree ^^
If you want to upgrade axial calipers go sp2. Beyond that, the RC51 is known to have generally the best oem axial brake setup going (barring the ultra exotic limited run euro bikes of that era with brembo superbike caliper specs).
IMO, there is no benefit either from going radial unless spendy on higher end brembo calipers or convert to a true radial bracket (and bottom leg) and at least high end oem radial calipers.
Last edited by kwtoxman; 08-14-2016 at 08:26 PM.