Latest from the DR Blog:
Ask Dr. Dirt: Mid-Drive vs. Hub-Drive eBikes?
Question: Can you tell me the difference between Mid drive vs. Hub drive ebikes? – Ashton, Eagle, CO Answer: Both mid-drive and hub-drive motor systems offer electric assistance, but they differ significantly in... READ MORE
Ask Dr. Dirt: eBike Battery Performance in Cold Weather?
Question: I noticed last November my eBike battery didn’t perform too well in the cold weather, can you explain why? – Jason, Saratoga Springs, NY Answer: E-bike battery performance can be significantly affected... READ MORE
Ask Dr. Dirt: Automatic Shifting eBikes?
Question: I heard Bosch and Shimano are making headway with auto shifting ebikes. Can you explain this and are there any real world benefits? – Taylor, Green River, UT Answer: Automatic e-bike shifting... 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