What is the Rule of 430?

Here comes a hard truth and some serious transparency. No matter what your bike is made from, all manufacturing releases greenhouse gases and aerosols. Bottom line: bikes are good by nature, but like anything that’s manufactured, they come at a cost to the environment. The great news is, you can take simple action—using your bike exactly as intended—to fully offset the carbon cost of your ride.

The Rule of 430 is a formula that demonstrates replacing about 430 driving miles with 430 riding miles can offset the carbon cost of your new bike. Anything above 430 miles, and your bike is now carbon-negative.*

*The Rule of 430 is a guideline based on the estimated average of our most popular 2019 bike models. Keep in mind the specific mileage to offset each model varies, due to differing emissions costs of each bike family.

How 430 is calculated

In a life-cycle assessment of four of our representative bike categories conducted by WAP Environmental Consulting, we acquired the value of the emissions from the average Trek bike—174kg CO2e. Using this, along with data from the EPA estimating that a single gallon of gas emits 8.887 Kg of CO2 and the average vehicle travels 22 miles per gallon, we came to this simple equation.

The impact of a bicycle

In 2020, we investigated the carbon emissions produced by four of our popular bike models: Madone, Marlin, Rail, and Fuel EX. Through this study, we not only determined the emissions caused by the production of our bikes and components, but also identified where we can improve our manufacturing and supply chain processes.

Let's get started making your bike carbon negative!

Product Compare Rack

Start comparison