from the BKP site
"What spacing is right for my bridge humbucker? Spacing refers to the distance from E pole to E pole on the bridge pickup of a humbucker equipped guitar. Standard spacing, usual with fixed Gibson style bridges is 50mm(it's actually 49.4mm on BKPs as per the original Gibson PAF but is rounded up to 50mm in the industry). Wide or F(Fender) spacing is typical of trem equipped guitars and is 53mm as per original Fender spacing. The majority of Gibson guitars are standard spaced although they have occasionally used a wide spaced bridge on some SG and Flying Vee series. PRS, despite fitting standard spaced humbuckers as stock are actually wide spaced on their trem equipped guitars.Neck pickups are always standard spacing. If in doubt...get the ruler out! "
I got miricle man set from him for a 24 PRS (one with a trem) and they were 53