shift knob size - Mazda3 Forums : The #1 Mazda 3 Forum Mar 22, 2006i found a nice weighted ISOTTA shift knob. but i want to verify it will fit. does anyone know what the thread size and shaft diam. is of manual tranny? shift knob size - Mazda3 Forums : The #1 Mazda 3 ForumMazda3 Forums : The #1 Mazda 3 Forum - View Single PostNov 20, 2018How do you remove the shift knob?Sep 23, 2010MS3 Gear Shifter Thread Size?Nov 26, 20092007 Mazda 3 Shift Knob - mazda3forumsMar 30, 2007See more results Shift Knob Thread Sizes – BAM SHIFTS The information provided on this page is to be used as a general guide. Thread sizes may vary depending on make and model of vehicle. Please measure the threads on your shifter prior to ordering. If you have any questions please contact us via e-mail at bamshiftsinfo@gmail Import VehiclesAcura™ - manual: 10mm x 1.