I recently bought some used Fulcrum CPX 4.5 off eBay. They seem to be in pretty good condition, the hub is fine and wheel runs true etc. However, I noticed that when I moved them I heard dust rolling about in the wheels. I pulled of the rim tape for the rear wheel and found loads of white dust (see picture bellow).

Is this corrosion of the wheel, or something else?

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2 Answers 2


Thats just the adhesive from the old rim tape.

Get a cloth and some rubbing alcohol and rub away, and it should look brand new.


Once you clean the surface completely, rubbing alcohol, goo gone, or your favorite cleanser.. look at the surface. Smooth = adhesive or some other junk, nothing to worry about (most likely the case). Pitted, degraded, or another type of surface damage would mean corroded. Enjoy the new rims!!! =D

  • 1
    I assume these are aluminum rims - how would it be possible for them to get corroded? Jul 6, 2017 at 22:05

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