its not a ti spring you can tell in the picture they are just steel that is grey i have one and yeah it will fit your rmx i just put one with the same measurements on my rmx

 never mind it looked like steel in the picture when it was small but lookin at it again it looks ti but they still usually come with steel and people think its ti

 if it will feet my rmx please om me your price for the spring only and for both thanks

 eye to eye, pound spring, and stroke ?

 8.5 X 2.5 with a 450lb spring

 its Ti