Size Extras only include the size-specific parts of a Cannier Set. You should get this if you would like more than one size for the same Cannier set.
You might need this when you are unsure of the size, and want to prepare for different sizes, or if you think you might change your rack to a different size in the future.
Size refers to the rack tube diameter. The Cannier set is sold for specific rack tube diameters to provide a tight fit.
Contact us for custom tube diameters.
6 mm, 8 mm, 10 mm, 12 mm