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Old 06-15-10, 09:18 AM   #1
plutonium83
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Advantages of Machined Brake Tracks?

What are the advantages and disadvantages of machined brake tracks? I'm just a humble commuter, not a racer or anything, and I'm wondering if its worth the extra money. I've search google but to no avail.
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Old 06-15-10, 09:28 AM   #2
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+ Prevents brakes on a new bike from squealing.

- Unnecessarily takes metal off of the sides of the rim where the brakes will be wearing off metal anyway.

Bottom line: Marketing

Some reading on the topic: http://www.sheldonbrown.com/brandt/machined-rims.html

Last edited by Shimagnolo; 06-15-10 at 09:34 AM.
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Old 06-15-10, 09:46 AM   #3
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+ Prevents brakes on a new bike from squealing.

- Unnecessarily takes metal off of the sides of the rim where the brakes will be wearing off metal anyway.

Bottom line: Marketing
A little bit of fail there for your reading pleasure.
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Old 06-15-10, 10:57 AM   #4
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The machined rims do hold up to tolerance better than non-machined ones. I true my wheels to +/- 0.001" when new. The machined rim has more exposed surface area for braking vs. a smooth surface. Manufacturers usually add a little more material to compensate for final machining.
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Old 06-15-10, 05:14 PM   #5
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Originally Posted by plutonium83 View Post
What are the advantages and disadvantages of machined brake tracks? I'm just a humble commuter, not a racer or anything, and I'm wondering if its worth the extra money. I've search google but to no avail.
Machined rims are smoother than pinned rims. All pinned rims, i.e. not machined, I've ever used have a slight annoying bump at the joint. Even after miles and miles of use along with removal of lots of sidewall material (braking wears the surface), the bump is still there.
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