Bicycle hub spacing and axle standards
6 posts
Boost vs Non-Boost Hubs: Spacing and Compatibility
Understand the difference between Boost and non-Boost hubs: exact over-locknut dimensions, thru-axle lengths, and what you need for wheel swaps and frame compatibility.
Bicycle Rear Hub Spacing Chart and Standards
Understand bicycle rear hub spacing standards, including OLD dimensions, quick-release vs thru-axle, Boost and Super Boost, and how to choose the right hub for your frame.
Bicycle Thru-Axle Adapters: Types and Compatibility
Understand bicycle thru-axle adapters: types, hub end caps, axle standards, hub spacing, quick-release conversion, trainer adapters, and compatibility in plain language with measurements and examples.
Bicycle Thru-Axle Sizes and Dimensions by Bike Type
Learn how to read tire sidewall numbers and understand bicycle thru-axle diameters, lengths, thread pitch, and hub spacing for road, gravel, mountain, and fat bikes.
Bicycle Thru-Axle Hex Size: Finding the Right Tool
Most bike thru-axles use a 6 mm hex, but 5 mm, 8 mm and Torx heads also exist. Learn how to read axle and tire markings and how to pick the correct hex key.
Bicycle Quick-Release Axle Dimensions: Diameter, Length and Hub Spacing
Standard bike quick-release axle sizes explained: 9 mm front and 10 mm rear axle diameter, 100/130/135 mm hub spacing, axle length, and how to measure them.