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Old 06-10-09, 09:13 AM   #1
Soma Lover
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Mavic rim rattle solved!

Just like a lot of others, my Mavic 717 rims started rattling after the tab used to tack the two ends of the rim together prior to welding the joint came loose. The front rim started rattling on the second ride and the rear after about a dozen rides. I hate creaks and knocks and rattles.

I don't know where I saw this trick mentioned, but I couldn't find it when I searched the forum so I figured I may as well start a new thread.

Anyway, I sprayed a little Dow Great Stuff Foam Sealant into the rim where the tab is rattling around, cleaned up the excess that oozed out into the spoke holes with acetone before it had a chance to cure, and left the wheels to finish curing overnight.

The sealant now prevents the tab from rattling around and for the moment, I am very pleased with the results.

What do you think? Did I do something stupid? Will it last? Would something else have worked better?

BTW, before any of you try this:
Spray a little foam out first. The first blast is often too much foam too fast.
Have your paper towels, swabs, and acetone ready. It's only 15 minutes or so before the sealant starts getting tough to remove.
Do both rims at the same time. By the next day, the sealant will haved cured and sealed the can too.
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Old 06-10-09, 10:50 AM   #2
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just a little bit goes a long way with that spray foam.
sounds like it did the trick. The proof will be how long it lasts.
I have heard of people using just a squirt of adhesive Caulking like
poly seamseal too.
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Old 06-10-09, 10:59 AM   #3
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I take a Mavic rim and shake it to detect a rattle. This is - of course - before I build it. If I hear a rattle I shake the daylights out of it with the hole for the valve facing downwards. What follows are small pieces of plastic come tumbling out. These appear to be part of some unknown eyelet. In any case, once this is done and no rattle is detected, I build my wheel(s) and am assured of a rattle-free ride.

Works for me.
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