It may not be a Z4, but we thought we’d share some photos and a video of this 1M on our new VS-5RS wheels. With a set of square 18x10 ET25 wheels and suspension architecture and other parts plucked straight from the E9X M3, we can’t imagine a better way to tear up the canyons.
All APEX Sprint Line forged wheels feature unpainted knurled beads. The problem with knurling is that it varies by manufacturer in design and effectiveness. Whether it’s a day at the track or months of street driving, repeated hard braking can make a tire slip on the bead seat and go out of balance, causing vibration.
Maintaining the effectiveness of our knurling was at the forefront of our minds when developing our new line of forged wheels, which is why there’s no paint covering the bead area. Instead of adding basic knurling with paint over it just to check that feature box from a marketing perspective, our engineers optimized the functionality of our knurled beads by leaving them unpainted to ensure they have a more effective “tooth” to bite into a tire’s bead. It is a more expensive process, but it is one of many details that results in a better wheel. To learn more, be sure to read our technical write-up below.