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Rm 701, 466 Yindu Rd, SH, CN

Custom Upper & Lower Control Arms Manufacturer | 4130 Chromoly A-Arms

Custom Upper & Lower Control Arms Manufacturer

SYZ Machine is a China-based custom control arm manufacturer specializing in 4130 chromoly upper and lower A-arms for off-road UTV and ATV applications. Our control arms are TIG welded in-house, engineered for high clearance, and built to outperform OEM parts on challenging terrain.
We supply aftermarket manufacturers, distributors, and performance shops worldwide — with matched ball joints, bushings, and rod ends available as complete kits.
Can-Am Maverick X3 & Polaris RZR

ATV UTV Control Arms & A-Arms

Below are representative custom control arm programs for Polaris and Can-Am platforms. We also support non-UTV suspension projects with custom geometry, material and joint configurations.
Custom Upper Control Arm for Can-Am Maverick X3 - 4130 Chromoly

Maverick X3 Control Arm Front Upper

For 72″ Can-Am Maverick X3
Position: Front upper left and right side
Material: Tig welding 4130 chromoly steel tubing
With ball joints and bushings

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Custom Lower Control Arm for Can-Am Maverick X3 - High Clearance A-Arm

Maverick X3 Control Arm Front Lower

For 72″ Can-Am Maverick X3
Position: Front lower left and right side
Material: Tig welding 4130 chromoly steel tubing
With ball joints and bushings

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Upper A-arms for Polaris RZR Pro XP, providing strength and improved suspension geometry.

RZR Pro XP Control Arms Front Upper

For Polaris RZR Pro XP
Type: Upper control arm
Material: Tig welded 4130 chromoly steel tubing
With ball joints and bushings

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Polaris RZR Pro XP Lower Control Arms with Ball Joints and Bushings

RZR Pro XP Control Arms Front Lower

For Polaris RZR Pro XP
Type: Lower control arm
Material: Tig welded 4130 chromoly steel tubing
With ball joints and bushings

QUOTE NOW

Upper vs Lower Control Arms — What's the Difference?

Custom Upper Control Arm for Can-Am Maverick X3 - 4130 Chromoly

Upper Control Arm

The upper control arm connects the top of the wheel hub to the vehicle frame. In high-clearance UTV builds, upgrading the upper arm allows for a greater wheel travel angle and protects the axle and CV joints from binding.

High-clearance lower control arm for Polaris XP 1000, designed for enhanced durability and suspension performance.

Lower Control Arm

The lower control arm bears the majority of the suspension load. A stronger lower arm — like our 4130 chromoly version with 0.120" wall tubing — prevents deformation during high-impact landings and hard cornering.

Do You Need Both?

For maximum performance, replacing both upper and lower control arms together ensures consistent geometry and clearance across the suspension arc.

How We Build Custom Control Arms

1

Material Selection

We stock DOM tubing and 4130 chromoly in multiple wall thicknesses (0.095″, 0.120″, 0.156″) to match your strength and weight requirements.

2

CNC Bending & Cutting

All tubes are precision-bent and cut to CAD specifications to ensure consistent geometry across production runs.

3

TIG Welding

Every joint is TIG welded by certified welders for clean, full-penetration beads that maximize fatigue resistance.

4

Powder Coating

Available in multiple colors. Standard black or custom color on request.

5

Quality Inspection

Each arm is inspected for dimensional accuracy and weld integrity before shipment.
why choose syzmachine control arms

Why SYZ MACHINE Control Arms?

  • Made of 4130 chromoly tubing
  • Upgraded arm material: 1/8” DOM Steel
  • 0.120” wall thickness
  • Multi-color choices for powder coated
  • High clearance design for challenging trails and axle protection
  • 100% aesthetic TIG welded
1043bj-ball-joint
UHMW bushing kit for Polaris, designed to reduce friction and enhance suspension performance.

Control Arm Ball Joints/Rod Ends/Bushings

We offer premium, precision-matched control arm kits designed to meet the highest industry standards. By providing high-performance solutions at competitive price points, we empower our clients to scale their businesses effectively.

request a catalog pictures

Request Control Arm Catalog

SYZ MACHINE Control Arm Fabrication

Easily Batch-Customize Control Arms

1

Tell Us What You Need

Send us your request with details and share your idea.

2

Get Solution and Quote

We will work on the best solution base on your request and send you a specific quote within 24 hours.

3

Support at All Times

Whether it is before or after the sale, we are always here to support you.

Control Arms FAQ

Control arms facilitate precision vertical articulation, allowing the suspension to adapt dynamically to surface irregularities. This ensures constant tire-to-road contact and maintains optimal vehicle stability, even on rugged or adverse terrain.

In front suspension systems, a control arm is frequently referred to as an “A-arm” due to its shape. It serves as a critical structural link connecting the chassis to the wheel assembly or steering knuckle.

This depends on the vehicle’s suspension configuration. In rear suspension setups, trailing arms function as control arms. However, front suspensions typically utilize “A-arm” geometry rather than the linear trailing arm design found in the rear.

  1. Audible Noise: Clunking or popping sounds when navigating bumps or uneven surfaces.

  2. Steering Instability: Reduced steering precision or wandering.

  3. Irregular Tire Wear: Accelerated or uneven tread wear patterns.

  4. Excessive Vibration: Discernible chassis shudder or steering wheel oscillation during operation.

The front suspension features a dual A-arm configuration (left and right), paired with two high-clearance radius rods. The rear suspension is equipped with a four-link radius rod assembly.

The front suspension utilizes two A-arms and four high-clearance radius rods. Depending on the specific model and trim, the rear suspension features either a four-link or six-link radius rod setup, with two or four being high-clearance variants.

Unlike passenger vehicles, which typically require replacement at 90,000 to 100,000 miles, UTV components are subject to extreme off-road stresses. If no “bad control arm symptoms” are detected during operation, replacement should be determined by structural inspections during scheduled maintenance intervals.

While engineered for durability, control arms are wear items. Common failure points include:

  1. Structural Damage: Bent or fractured arm bodies due to impact.

  2. Bushing Degradation: Torn or excessively worn bushings leading to play.

  3. Ball Joint Failure: Worn or seized ball joints compromising articulation.

Yes, we also produce ball joints and bushings, so we can provide matching ball joints and bushings base on your request.