Firstgear Heated Jacket Liner Gen 4 Small — 12V Motorcycle Gear

SKU: FSG527458
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Sale price$249.99
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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 First Gear

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

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Advanced Thermal Control: Firstgear Gen 4 Liner

The Firstgear Heated Jacket Liner Gen 4 in Small represents the pinnacle of motorcycle thermal technology. Designed to provide comprehensive warmth for your chest, back, arms, and collar, this liner is a game-changer for cold-weather touring. The Gen 4 series features improved heating element placement and more efficient power distribution, ensuring you stay warm even when the temperatures plummet.

Why Choose the Gen 4 Liner?

  • Multi-zone heating for full upper-body coverage
  • Gen 4 technology offers faster heat-up times and better efficiency
  • Lightweight, compressible design for easy storage when not in use
  • Integrated power connections for a clean, hassle-free installation
  • Designed to be worn under your existing riding jacket

Riding in the cold can be dangerous if you aren't properly equipped. By using the Firstgear Gen 4 liner, you ensure that your body stays at an optimal temperature, which helps prevent muscle stiffness and fatigue. This liner is not just about comfort; it is about safety and endurance on the road. The materials are soft against the skin, and the fit is tailored to minimize bulk, allowing you to wear your protective riding gear over the top without sacrificing mobility. Whether you are a daily commuter or a long-distance adventurer, this jacket liner is an essential piece of equipment for your winter arsenal. Experience the warmth and reliability of Firstgear products today at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About First Gear

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

Watch in action

Advanced Thermal Control: Firstgear Gen 4 Liner

The Firstgear Heated Jacket Liner Gen 4 in Small represents the pinnacle of motorcycle thermal technology. Designed to provide comprehensive warmth for your chest, back, arms, and collar, this liner is a game-changer for cold-weather touring. The Gen 4 series features improved heating element placement and more efficient power distribution, ensuring you stay warm even when the temperatures plummet.

Why Choose the Gen 4 Liner?

  • Multi-zone heating for full upper-body coverage
  • Gen 4 technology offers faster heat-up times and better efficiency
  • Lightweight, compressible design for easy storage when not in use
  • Integrated power connections for a clean, hassle-free installation
  • Designed to be worn under your existing riding jacket

Riding in the cold can be dangerous if you aren't properly equipped. By using the Firstgear Gen 4 liner, you ensure that your body stays at an optimal temperature, which helps prevent muscle stiffness and fatigue. This liner is not just about comfort; it is about safety and endurance on the road. The materials are soft against the skin, and the fit is tailored to minimize bulk, allowing you to wear your protective riding gear over the top without sacrificing mobility. Whether you are a daily commuter or a long-distance adventurer, this jacket liner is an essential piece of equipment for your winter arsenal. Experience the warmth and reliability of Firstgear products today at GGCRACING.

Product Details

Product Description

About First Gear

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

Watch in action

Advanced Thermal Control: Firstgear Gen 4 Liner

The Firstgear Heated Jacket Liner Gen 4 in Small represents the pinnacle of motorcycle thermal technology. Designed to provide comprehensive warmth for your chest, back, arms, and collar, this liner is a game-changer for cold-weather touring. The Gen 4 series features improved heating element placement and more efficient power distribution, ensuring you stay warm even when the temperatures plummet.

Why Choose the Gen 4 Liner?

  • Multi-zone heating for full upper-body coverage
  • Gen 4 technology offers faster heat-up times and better efficiency
  • Lightweight, compressible design for easy storage when not in use
  • Integrated power connections for a clean, hassle-free installation
  • Designed to be worn under your existing riding jacket

Riding in the cold can be dangerous if you aren't properly equipped. By using the Firstgear Gen 4 liner, you ensure that your body stays at an optimal temperature, which helps prevent muscle stiffness and fatigue. This liner is not just about comfort; it is about safety and endurance on the road. The materials are soft against the skin, and the fit is tailored to minimize bulk, allowing you to wear your protective riding gear over the top without sacrificing mobility. Whether you are a daily commuter or a long-distance adventurer, this jacket liner is an essential piece of equipment for your winter arsenal. Experience the warmth and reliability of Firstgear products today at GGCRACING.

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