Category:16th-century Egyptian people
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Category:Possibly living peopleQ:
What are the differences between 20 mm and 21 mm brakes?
I am considering replacing my bike's wheels, and currently have plans to replace the calipers too.
I know that the difference in price can be accounted for by the fact that the 21 mm brake callipers require two hands to disassemble, but does the remaining difference in price, which is about £80 (about $150 CAD), account for other differences?
The reason I ask is that the only other difference I can discern is the material: from looking at a bike with a 21 mm rear brake and a 20 mm front brake it is clear that the material on the 21 mm callipers are smoother.
(This is not a factor when I compare 20 mm callipers on a set of wheels. Those were made at about the same time and are also from the same company, so I know the 20 mm ones are "as smooth as 22 mm callipers, which is the bottom of the range".)
What is this material difference about? Is it the only thing, or is there something else that I am missing?
A:
The differences are mostly fit and finish. I have had to fix a couple of my friends broken 20mm calipers on their wheels. the quality of parts is not great and they are a very easy fix.
My first choice is always 21mm unless they are on a very low price bike where the 20mm's are an option.
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