509 helmets come in various models, each with different weights depending on the materials used. 


Choosing between carbon fiber and non-carbon helmets depends on your priorities. If you value lightweight and superior strength, a carbon fiber helmet is the way to go. However, if you’re looking for a more budget-friendly option with good durability, a fiberglass or polycarbonate helmet will serve you well.



Here’s a quick overview:

509 Altitude 2.0 Helmet Series

  1. Altitude 2.0 Fiberglass:

  2. Altitude 2.0 Carbon Fiber:

Difference Between Carbon and Non-Carbon Helmets

Carbon Fiber Helmets

  1. Weight: Carbon fiber helmets are significantly lighter. For example, the Altitude 2.0 Carbon Fiber helmet is about 130 grams lighter than its fiberglass counterpart
  2. Strength: Carbon fiber offers a superior strength-to-weight ratio, making the helmet both strong and lightweight
  3. Durability: Carbon fiber helmets are more durable and can better withstand impacts without compromising on weight
  4. Cost: Typically, carbon fiber helmets are more expensive due to the advanced materials and manufacturing processes involve

Non-Carbon Helmets (Fiberglass and Polycarbonate)

  1. Weight: These helmets are generally heavier than carbon fiber helmets. For instance, the Altitude 2.0 Fiberglass helmet weighs around 1200 grams
  2. Cost: Fiberglass and polycarbonate helmets are usually more affordable, making them a popular choice for budget-conscious riders
  3. Durability: While still durable, these materials do not offer the same strength-to-weight ratio as carbon fiber3.
  4. Impact Resistance: Fiberglass helmets provide good impact absorption and are less prone to scratches and dents compared to polycarbonate