About
Who is Milling Mill?
Milling Mill is a young company with a great deal of experience in vehicle dynamics for cars, motorcycles and bicycles. I’m John van Wanroij, the founder. Before starting Milling Mill, I ran JJ Suspension and ESA Repair, which I sold in December 2023. Those years gave me extensive experience in electronically controlled suspension for motorcycles.
My specialty?
Suspension solutions, as a complete package. I develop it, make it, install it and test it myself, all within four walls. Manual, electronic or ride height. More than thirty years in, my hunger for knowledge has never been satisfied.
“Impossible is just an opinion, it is not a fact”
My background
From toolmaker to suspension engineer
1989
Start career
It all started with an interest in metal cutting machines. In 1989 I started as an apprentice toolmaker at two tool shops. That’s where I learned the trade, and I practiced it for 14 years with great pleasure: CNC turning, CNC milling, CNC flat and round, CAD and CADCAM. Now it’s SolidWorks.
2002
Caught the suspension bug
In 2002 I caught the suspension bug at WP Suspension. I started as a test engineer and test rider in aftersales (asphalt and racing), later on the OEM side for BMW.
I also worked as an application engineer, in the testing, racing and R&D departments (suspension and motorcycle geometry), and as OEM test rider for WP – BMW ESA.
There I made the first BMW ESA suspension: from scratch to a working prototype and OEM production, with prototype CNC milling and the development of replacement OEM parts. I still make those parts today.
2008
Moton suspension
When WP Suspension moved to KTM in Mattighofen, I started at Moton Suspension in Uden, now part of AST.
2009
JJ Suspension & ESA Repair
I started two companies: JJ Suspension and ESA Repair.
ESA Repair repaired electronic and dynamic suspension and improved standard dynamic suspension. I developed and made all the tools, and built up the knowledge, to overhaul ESA suspension myself.
JJ Suspension was my company in the automotive industry, specialized in hydraulics. With my own CNC mill and lathe I could move fast: small and medium series, quick modifications to existing parts, and toolmaking.
I ran both companies with great pleasure until the end of 2023, when I sold them to Wesley Pittens. After a successful training period, he continues them.
2024
Milling Mill
In January 2024 I started Milling Mill and set my course back to suspension: developing and further developing, from a new concept to a working prototype, all in-house.
How I work
I’m a hands-on, no-nonsense type. Because it all happens in my own workshop, your project stays private: fewer eyes, better confidentiality. I don’t publish customer work unless the customer says it’s okay.
Some customers come with something that needs improving. Others want a new concept engineered from scratch. They range from companies in the suspension industry to private owners. Working on location is negotiable.
Let’s find out what’s possible
Stuck with a hydraulic suspension problem? Short on R&D capacity? Need a fast prototype, a sparring partner, or a fresh look at your current concept? Then I might be the person you need.