QA1 builds the Ultimate Ball Joint for a wide range of racing and performance suspension applications. This patented, self-lubricating design is exclusive to QA1 and is 100 percent owner rebuildable, with all internal parts replaceable at economical prices. Multiple stud lengths allow easy geometry changes, and infinite preload adjustment lets breakaway torque be set as low as 0 ft-lbs for smooth, bind-free operation. Precision tolerance ball-to-race conformity distributes load evenly for strong wear resistance, and a precision-ground 52100 bearing steel race delivers long life and smooth movement. The ball joint can be adjusted without removing it from the vehicle, which makes roll center tuning simple.
Specifications:
- Type: QA1 Ultimate Ball Joint (adjustable, owner rebuildable)
- Mounting style: Press-In
- Location: Lower
- Internal race: precision-ground 52100 bearing steel
- Preload: infinite adjustment, breakaway torque from 0 ft-lbs
- Design: patented, self-lubricating, 100 percent owner rebuildable
- Part number: 1210-227
FAQ
What is the QA1 part number for this ball joint?
This listing is QA1 part number 1210-227.
How does this ball joint mount?
It uses press-in mounting and installs in the lower control arm location for racing and performance applications.
Is this QA1 ball joint rebuildable?
Yes. The Ultimate Ball Joint is 100 percent owner rebuildable, and all internal parts are replaceable, so the unit does not have to be discarded when components wear.
What does the adjustable preload do?
Infinite preload adjustment lets breakaway torque be set as low as 0 ft-lbs, giving smooth, bind-free movement, and the ball joint can be adjusted without removing it from the vehicle.
Where is this ball joint typically used?
It is built for racing and performance applications in the lower location using press-in mounting.

