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Technical FAQ: Noisy Mavic wheel

  • By Lennard Zinn
  • Published Oct. 10, 2006
  • Updated Nov. 17, 2009 at 5:00 PM EDT

Dear Lennard,
I own a set of Mavic SL wheels with about 4000 miles on them. Today for the first time when I was riding over train tracks, just when I got over them, I heard this loud screeching noise coming from the wheels while I was gliding. I stopped thinking I had a flat. When I started again it was fine.

Until about 20 minutes later I was traveling down a hill and when I applied the brakes, same thing. It sounds like a bearing to me but when I spin the wheels up on the stand they seem fine. How will I knowif I have a bearing problem? They are cartridge bearings by the way.
-David

Dear David,
It sounds like your bearings are shot. They just don’t squeal whenthey’re not under load. They are easy to pop out. Push the new ones inwith the old ones tapping on them with a wooden or rubber mallet.
-Lennard

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Lennard Zinn

Lennard Zinn

Our longtime technical writer joined VeloNews in 1987. He is also a framebuilder, a former U.S. National Team rider, and author of many bicycle books, including Zinn and the Art of Mountain Bike Maintenance and Zinn and the Art of Road Bike Maintenance, as well as Zinn and the Art of Triathlon Bikes and Zinn's Cycling Primer: Maintenance Tips and Skill Building for Cyclists. He holds a Bachelor’s degree in physics from Colorado College. Readers can send brief technical questions to Ask LZ.

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