This is a shift knob I modeled for my 5-speed manual Ford Fusion. Its stock shift knob is a heavy chunk of PVC, with a fake leather and chrome finish. The center of gravity is so far above the shifter shaft that it offers zero feel, so you don't know if you quite got into first gear or not.

I designed this somewhat as a between of a Cobb shift knob and a Hurst-type shifter with a white ball on the end. The Cobb version is $90... so no. The Hurst is made for old-school American muscle cars with imperial threads, and this car is a half-American half-Japanese mutt with a metric shift knob thread.

This knob should work with most Mazdas that have a M10x1.25 shift thread and thread pitch, so almost all MX-5s/Miatas, 323s, Proteges, 3s, 6s, probably 626s and the Ford models with Mazda transmissions in them, such as my Fusion, second and third-gen Escorts, etc. The all-Ford models such as Focus STs use M12x1.25, which will require this knob to be remodeled.

The sketch on top can be changed for a 6-speed pattern, but I only sketched in a 5-speed to match my Fusion's gauge cluster font.

Happy shifting!

My Fusion uses a 10mm diameter 45mm length shaft above the shift boot from top to bottom. The threaded portion is M10x1.25, which extends 26.14mm from the top. I modeled in 26.25mm as a buffer for over-tightening. The bottom section is a straight 11mm cylinder, allowing some tolerance before the threads bite. In my last version, I modeled it with threads fully down the inside but the bottom portion mashed them.

The diameter of the knob is 50mm or 2 inches, which matches smaller commercial knobs and fits my small hand and is tapered to match the shift boot and gives you some room to grip around the bottom if you prefer to shift that way.