Latest from the DR Blog:
Ask Dr. Dirt: Special chain required for my eBike?
Question: I see these specific eBike chains for sale, do I need a special chain for my converted mountain eBike? – Arthur, Grand Junction, CO Answer: The amount of torque coming out of... READ MORE
What are ASTM standards?
ASTM International, formerly known as the American Society for Testing and Materials, is an international standards organization that develops and publishes technical standards for a wide range of materials, products, systems, and services.... READ MORE
Ask Dr. Dirt: Riding with battery in backpack?
Question: Are there any advantages to removing e-bike battery from the bike and riding with it in a backpack? – Clement, Pacific Beach, CA Answer: You didn’t mention if you were riding on... READ MORE
Case Study: E-bike Motor Gearbox Grease
Industry Client Size Engagement E-Motor $5M+ Sub $5K development & materials Problem Modern e-bike gearbox designs often require high power transfer with minimal noise and heat generation. During initial testing of a new... READ MORE