Hyperco 18425Q100 QM Coil-Over Spring 1.625in ID 100 lb/in Rate — 4.25in Tall

SKU: BJRF_184.25Q100
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Hyperco

Hyperco engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Hyperco lineup with fast shipping and expert fitment support — order with confidence.

Maximum Performance with Hyperco 100 lb/in QM Coil-Over Springs

When uncompromising stiffness and control are paramount in a compact suspension system, the Hyperco 18425Q100 QM Coil-Over Spring is the definitive choice. This top-tier Quarter Midget (QM) series spring boasts a potent 100 lb/in rate, providing the most rigid response in its class for critical applications. It's engineered to deliver immediate feedback and minimal deflection, empowering drivers with superior confidence and precision on the track or in specialized builds.

Peak Engineering & Reliability:

  • Extreme Stiffness: A 100 lb/in spring rate offers the highest level of firmness for ultimate control, ideal for competitive racing and heavy-duty compact setups.
  • Compact Dimensions: Perfectly sized with a 1.625-inch ID and 4.25-inch length to integrate into the most space-restricted suspension designs.
  • Premium Alloy Construction: Fabricated from advanced steel alloys, ensuring unparalleled fatigue resistance, consistent performance, and a longer operational life.
  • Durable Blue Finish: Protected by Hyperco's signature blue powder coat, which resists corrosion, abrasion, and maintains its vibrant appearance under harsh conditions.

Key Specifications:

  • Category: Quarter Midget (QM) Coil-Over Spring
  • Inside Diameter (ID): 1.625 inches
  • Length: 4.25 inches
  • Spring Rate: 100 lb/in
  • Material: High-Performance Steel Alloy
  • Finish: Blue Powder Coat

Each Hyperco 18425Q100 spring is sold individually, enabling meticulous tuning of your vehicle's dynamics. For the pinnacle of compact suspension performance, choose Hyperco, exclusively at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Hyperco

Hyperco engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Hyperco lineup with fast shipping and expert fitment support — order with confidence.

Maximum Performance with Hyperco 100 lb/in QM Coil-Over Springs

When uncompromising stiffness and control are paramount in a compact suspension system, the Hyperco 18425Q100 QM Coil-Over Spring is the definitive choice. This top-tier Quarter Midget (QM) series spring boasts a potent 100 lb/in rate, providing the most rigid response in its class for critical applications. It's engineered to deliver immediate feedback and minimal deflection, empowering drivers with superior confidence and precision on the track or in specialized builds.

Peak Engineering & Reliability:

  • Extreme Stiffness: A 100 lb/in spring rate offers the highest level of firmness for ultimate control, ideal for competitive racing and heavy-duty compact setups.
  • Compact Dimensions: Perfectly sized with a 1.625-inch ID and 4.25-inch length to integrate into the most space-restricted suspension designs.
  • Premium Alloy Construction: Fabricated from advanced steel alloys, ensuring unparalleled fatigue resistance, consistent performance, and a longer operational life.
  • Durable Blue Finish: Protected by Hyperco's signature blue powder coat, which resists corrosion, abrasion, and maintains its vibrant appearance under harsh conditions.

Key Specifications:

  • Category: Quarter Midget (QM) Coil-Over Spring
  • Inside Diameter (ID): 1.625 inches
  • Length: 4.25 inches
  • Spring Rate: 100 lb/in
  • Material: High-Performance Steel Alloy
  • Finish: Blue Powder Coat

Each Hyperco 18425Q100 spring is sold individually, enabling meticulous tuning of your vehicle's dynamics. For the pinnacle of compact suspension performance, choose Hyperco, exclusively at GGCRACING.

Product Details

Product Description

About Hyperco

Hyperco engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Hyperco lineup with fast shipping and expert fitment support — order with confidence.

Maximum Performance with Hyperco 100 lb/in QM Coil-Over Springs

When uncompromising stiffness and control are paramount in a compact suspension system, the Hyperco 18425Q100 QM Coil-Over Spring is the definitive choice. This top-tier Quarter Midget (QM) series spring boasts a potent 100 lb/in rate, providing the most rigid response in its class for critical applications. It's engineered to deliver immediate feedback and minimal deflection, empowering drivers with superior confidence and precision on the track or in specialized builds.

Peak Engineering & Reliability:

  • Extreme Stiffness: A 100 lb/in spring rate offers the highest level of firmness for ultimate control, ideal for competitive racing and heavy-duty compact setups.
  • Compact Dimensions: Perfectly sized with a 1.625-inch ID and 4.25-inch length to integrate into the most space-restricted suspension designs.
  • Premium Alloy Construction: Fabricated from advanced steel alloys, ensuring unparalleled fatigue resistance, consistent performance, and a longer operational life.
  • Durable Blue Finish: Protected by Hyperco's signature blue powder coat, which resists corrosion, abrasion, and maintains its vibrant appearance under harsh conditions.

Key Specifications:

  • Category: Quarter Midget (QM) Coil-Over Spring
  • Inside Diameter (ID): 1.625 inches
  • Length: 4.25 inches
  • Spring Rate: 100 lb/in
  • Material: High-Performance Steel Alloy
  • Finish: Blue Powder Coat

Each Hyperco 18425Q100 spring is sold individually, enabling meticulous tuning of your vehicle's dynamics. For the pinnacle of compact suspension performance, choose Hyperco, exclusively at GGCRACING.

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