UPDATE: there are now 3 options M10, M12 and M18 screw threads. The problem : I want to put a real gearknob on my driving force Logitech Shifter. Gently pry the plastic cap off of your Logitech gear shifter using a flat blade.
USB Handbrake Mount Plate Sturdy Racing Game Shifter Bracket for /27/29 T500 14 Bit PC USB Game Handbrake for SIM Racing Shifter Black Stainless Steel 8.5in X 4.1in
Jiawu Desk Mount for Racing Sim Shifter, Stainless Steel Shifter Desks Mounts, Adjustable Universal Desk Mount Clamp for Driving Force
Universal Adjustable Desk Mount Clamp for Racing Shifter,Arrow Storage Case Bracket for Driving Force Shifter, for TH8A, for SIM Racing,Black Stainless Steel,1 Set for Simulators
Racing Game Shifter Desk Mount,Sturdy Quick Install Bracket for USB Handbrake,Adjustable Width Clamp for SIM Racing Shifter,Black Stainless Steel,1 Piece for Simulations
Eminchu Universal Adjustable Desk Mount for Sim Racing Shifter Arrow Storage Case Clamp for Driving Force Shifter, TH8A, Secure Installation for Racing Game for Sim Handbrake, Stainless Steel, Black
Dilwe USB Handbrake Mounting Plate, Adjustable Gear Shifter Bracket for T300 Racing Enthusiasts, Black Stainless Steel, Size 8.5 X 4.1 Inch