Shimano WH-6800 not fit for purpose!

[Majorblisters]

If it's a steel valve through an aluminium rim the dissimilar metals can cause corrosion, presume that's why the mention the sealant in their blurb?.

Maybe, but the steel valve doesn't make direct contact with the aluminium due to the rubber seal in between

 

[Majorblisters]

Any corrosion anywhere else. Does seem strange as strictly speaking, thats also sealed against outside elements attacking the surface.

No corrosion anywhere else, only around the valve hole, on both wheels.

 

[Majorblisters]

Good morning,

I know that you have WH-6800 wheels and this is a link to a document covering the WH-6700 (and other) wheels but it might make things difficult for you. :-)

https://si.shimano.com/pdfs/dm/DM-WH0004-01-ENG.pdf

< WH-6700 > • We do not recommend that you use general-purpose alkaline puncture repair agents, as they may cause the rims to corrode and allow air leaks to occur.

Would the sealant that you used be one of these?

Bye

Ian

Hmm, yeah, I was kinda aware of this. But why would you go tubeless without using sealant, that would be daft, surely.. I really don't understand Shimano's thinking on this.

 

[Globalti]

Well latex is 66% water (comes from trees, remember) which won't do alloy rims any good and it's also alkaline as it contains 0.3% ammonia so you've got double trouble anywhere there's prolonged contact with unprotected alloy.

 

[CXRAndy]

Fill with epoxy metal adhesive,smooth down. Use two layers of correct width (internal rim spacing) I like stans tape- its strong and pulls taught smooth. Cut a small X for valve and tighten down valve. When you've got the tyre back on with sealant (I use Orange endurance). retighten the valve again as the pressure inside will loosen the valve nut.

 

[silva]

Wat op de foto staat lijkt sterk op cavitatiecorrosie - snelle drukdalingen.