I HAVE A ROCKSHOX SUPER DELUXE ULTIMATE COIL RC2T 230mmx 62.5 FOR MY SANTA CRUZ V2 MEGATOWER I HAVE A 450LB SPRING ON BUT REALY WANT A 475LB NOT A 500LB ANYONE KNOW OF ANY OTHER BRANDS THAT WOULD WORK WITH IT. ROCK SHOX ONLY GOES UP IN 50LBS AND SPRINDEX FEEL LIKE SHIT IN MY OPINION ALL READY TIRED. WAY TO PROGRESSIVE FOR ME. CHEERS
I believe MRP and Nukeproof are the same 38mm internal diameter as RS springs so should work fine.
EXT is slightly bigger I.D. as far as I know so they will fit over the shock body, but I'd do a bit more digging to determine if it plays nicely with the standard RS spring retainer and preload collar.