What Are the Physical Properties of BST Carbon Fiber Wheels?

BST wheels are manufactured using prepreg carbon fiber, a high-performance composite material ideally suited for lightweight, high-strength applications like motorcycle wheels. This material combines woven and unidirectional carbon fibers embedded in a toughened epoxy resin matrix, offering an exceptional balance of strength, stiffness, and durability.

Here are the key physical properties that make it the ideal material for BST wheels:

Material Specifications

• Fiber Type: Woven and unidirectional carbon fiber
• Resin Type: Toughened epoxy matrix
• Construction Method: Monocoque (single-piece) hollow-spoke structure using BST’s patented process

Thermal Properties

• Maximum Structural Temperature: 100°C (212°F)
• Minimum Structural Temperature: -40°C (-40°F)
• Maximum Continuous Operating Temperature: 80°C (176°F)

Chemical & Environmental Resistance

• Corrosion: 100% corrosion-free (unlike aluminum or steel)
• Chemical Resistance: Resistant to most solvents (e.g., acetone, benzene, paint thinners)
• Automotive Fluids: Limited resistance to brake fluids and strong acids

Mechanical Properties

• Density: ~1.7 g/cm³ (Compared to Aluminum: 2.7 g/cm³, Titanium: 4.5 g/cm³, Steel: 7.9 g/cm³)
• Damage Tolerance: Comparable to 2024-grade aluminum
• Strength: Higher than 2024 aluminum
• Stiffness (Modulus of Elasticity): Similar to 2024 aluminum

Engineering Advantages

• Custom Fiber Orientation:Fibers are precisely aligned in the direction of stress for maximum strength and efficiency
• Variable Wall Thickness: Material thickness can be increased in high-stress zones for added durability—without unnecessary weight
• Monocoque Design: BST’s unique one-piece hollow spoke construction eliminates weak points and reduces weight

These properties, combined with BST’s autoclave curing process, result in wheels that are not only significantly lighter than traditional metal wheels but also stronger, stiffer, and engineered for maximum performance on both street and track.