SUS Shift Knobs – Optimized for ergonomic comfort and weighted for driving feel GReddy 304 stainless steel shift knobs, are designed precise gear changes. The Sphere shaped ball design measures 45mm in diameter, 55mm tall, with a 13mm tall, 25mm dia. base. The material, size and shape allows this compact shift knob to weigh a lofty 363g (.80lbs.) This benefits the driving feel by counter-weighting the shift lever. Each GReddy CNC Stainless Shift Knob includes 3 of the most common thread sizes inserts to suit most Japanese manual transmission shifters. They are color coded in the GReddy corporate colors: Yellow, Teal and Blue.