Performance Racing Market

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When Safety Matters, Trust the Source

The performance racing market demands tubing that meets exact specifications, withstands extreme stress, and meets the stringent standards for safety-critical applications. Plymouth® manufactures race car tubing that exceeds these requirements, which is why we are the preferred race car tubing supplier and manufacturer for more than 50 years. By choosing Plymouth®, customers gain the certainty of a premium, American-made product proven by decades of uncompromising performance.

Performance Racing Applications:

  • Chassis
  • Frames
  • Steering Components
  • Roll Bars
  • Suspension Components
Carbon Alloy

When Safety Matters, Trust the Source

The performance racing market demands tubing that meets exact specifications, withstands extreme stress, and meets the stringent standards for safety-critical applications. Plymouth® manufactures race car tubing that exceeds these requirements, which is why we are the preferred race car tubing supplier and manufacturer for more than 50 years. By choosing Plymouth®, customers gain the certainty of a premium, American-made product proven by decades of uncompromising performance.

Performance Racing Applications:

  • Chassis
  • Frames
  • Steering Components
  • Roll Bars
  • Suspension Components

Plymouth® Performance Racing Products

Plymouth Motorsports Products™ is our family of products manufactured to meet your high-performance racing needs. These products include Plymouth ProMoly® 4130 Cold Drawn Seamless Tubing, Plymouth Pro18™ 1018 and Pro26™ 1026 Cold Drawn Seamless Tubing, and Plymouth Pro20™ Drawn Over Mandrel (DOM) Tubing. These are the preferred products for the construction of several performance racing components.

ProMoly®: 4130 Seamless Steel Tubing

ProMoly® is Plymouth®’s proprietary chromoly tubing that offers higher dimensional consistency, strength, and performance compared to traditional 4130 tubing. These features ensure consistent build quality, an improved strength-to-weight ratio, greater fatigue resistance, and other advantages for race car tubing.

ProMoly® Specifications

MeasurementInches/FeetMetric

OD Range 

0.250” – 2.000” 

6.35mm – 50.8mm

Minimum OD Tolerance

+/- 0.005” (up to 1.500” OD) 

+/- 0.127mm (up to 38.1mm)

Maximum OD Tolerance

+/- 0.10” (above 1.500” OD)

+/- 2.54mm (above 38.1mm)

Wall Range 

0.025” – 0.187” 

0.635mm – 4.75mm 

Minimum Wall Tolerance

+/- 10% (For IDs over 0.500”)

+/- 10% (For IDs over 12.7mm)

Maximum Wall Tolerance

+/- 15% (for IDs under 0.500”)

+/- 15% (for IDs under 12.7mm)

Maximum Length

26’ 

7.9m

Minimum Yield StrengthMinimum Tensile StrengthMinimum Percent Elongation in 2”, Full Tube

 95,000 psi 

105,000 psi 

15%

Industry Specifications and Certifications

  • Grade: 4130
  • Industry Specifications: AMS-T-6736A | AMS-6371 | AMS-6360 | MIL-T-6736B
  • Certifications: ISO 9001

ProMoly® is a registered trademark of Plymouth Tube Company.

Carbon DOM Tubing

Plymouth Tube Company has been an industry-leading manufacturer of carbon drawn over mandrel (DOM) tubing for more than 90 years. Carbon DOM tubing gives manufacturers customizable tubing with exceptional OD and ID dimensional precision.

ASTM A513-5: Carbon DOM Tubing Specifications

MeasurementInches/FeetMetric

OD Range 

0.250” – 1.8750” 

6.35mm – 47.63mm 

Wall Range 

0.025” – 0.125” 

0.635mm – 3.175mm 

Maximum Length 

26’ 

7.9 m

Industry Specifications

  • Carbon Grades: 1010 – 1020

Cold Drawn Seamless Steel Tubing

Plymouth®’s seamless cold drawn carbon and alloy steel tubing is manufactured to order based on the grade, size, and performance specifications provided by the customer.

ASTM A519: Cold Drawn Seamless Carbon & Alloy Steel Tubing Specifications

MeasurementInches/FeetMetric

OD Range

0.250” – 2”

6.35mm – 50.8mm

Wall Range

0.025” – 0.187”

0.635mm – 4.75mm

Maximum Length 

26’ 

7.9m

Industry Specifications

  • Carbon Grades: 1010 – 1018
  • Alloy Grades: 4130, 4140

Downloads & Resources

FileLanguageSizeDownload
ProMoly® BrochureEN3 MB Download
Streamline Shaped TubingEN144 KB Download
Plymouth Product CatalogEN4 MB Download
VideoWatch
Fabricating, Bending, Welding, 4130 Tubing Watch
Specifying ProMoly® is a Seamless Decision Watch
ProMoly® 4130 Cold Drawn Seamless Tubing Watch
Eupora DOM Process Watch
Eupora and FTS at Plymouth® | Manufacturing Capabilities & Facility Overview Watch
Why Seamless Carbon and Alloy Steel Tubing? Watch
Trust the PROs – Welding Tips from the Experts Watch
Specify ProMoly® for your 4130 Tubing needs! Watch
Plymouth® – Tubing and Shapes You Can Trust Watch

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