Well im new to the downhill/freeride scene, i rode a friends bike and i was instantly hooked, so i want to convert my 2007 GT chucker 2.0 into a meaner bike so i have been looking at forks, i am probably picking up a pair of 2005' NIXON super IT with 145 mm of tavel and along with those forks im buying 20mm marzocchi front hub and then a front and rear Magura Venti Disc brake rotor, ROTOR ONLY, and i have a stock sized 6" brake, so i need to know about the deal with brake adaptors theres the 74mm gap between bolts or the 51mm i believe this fork im buying is a 74mm, but im not sure how the spacers work where you can convert the gap from a 74mm to a 51mm, and if so i need the 74mm to the 51 right? well so far this site hasn't let me down so thanks guys!