Custom Adjustable Motorsport Control Arms

At 4RUO, we manufacture custom adjustable motorsport control arms engineered to your exact specifications, with lengths available from 100 mm to over 500 mm. Each arm is built from thick‑walled seamless chromoly steel and produced using precision CNC machining, ensuring exceptional strength, long‑term durability, and consistent fitment across a wide range of motorsport applications.

To maximize performance, every control arm is paired with motorsport‑grade spherical bearings featuring forged chromoly bodies and corrosion‑resistant finishes. Designed for high‑load, high‑precision environments, our components deliver top‑tier motorsport performance, offering outstanding reliability, precise suspension control, and consistent results under demanding racing conditions.

Technical Specifications

​Construction

• Tube constructed from thick‑walled, seamless chromoly steel for maximum strength
• Precision CNC‑machined threads for accurate adjustment and consistent fitment
• Example configuration shown: adjustable control arms ranging from 343 mm to 377 mm
• Custom lengths available on request to suit specific suspension setups

Motorsport-Grade Bearings

• RM14MTE spherical bearings designed for high‑load motorsport suspension applications
• Forged chromoly steel bodies for maximum strength and durability
• PTFE liners for smooth articulation and reduced friction under extreme conditions
• Corrosion‑resistant construction with nickel‑plated bodies, chrome‑plated inner rings, and stainless steel races
• Load capacity rated to 5700 N at 14°, ensuring reliable performance at high operating angles
• Additional bearing sizes available on request to suit custom suspension geometries

EXAMPLE APPLICATIONS USING OUR CUSTOM CONTROL ARMS:

• BMW F8X adjustable rear toe arms, with our own bumpsteer correction bushes
• BMW G8x adjustable rear toe arms