so it’s theoretically possible i might need new wheels…

This topic has 10 replies, 4 voices, and was last updated 8 years ago by anomad.

Viewing 10 posts - 1 through 10 (of 10 total)

Author

Posts
April 30, 2017 at 11:05 pm #1070099

anomad
Participant

Wow I’ve never seen that before. What kind of sealant do you use, saltwater? Just kidding. I wonder if it was the dissimilar metals of the valve stem and the rim combined with the sealant that accelerated corrosion in that area. Granted I have very little experience with tubeless. Does tape help prevent that kind of corrosion?

You could certainly lace up a new rim or rims without going for a whole new wheelset. That might be more economical if you have lots of life left in the hubs and/or high end hubs.

April 30, 2017 at 11:11 pm #1070100

hozn
Participant

Interesting. I have heard people say that tape saves rims, but I didn’t believe it until now. Maybe switch to a different sealant. I know some don’t have ammonia — if that is the problem.

April 30, 2017 at 11:35 pm #1070101

Anonymous
Guest

@anomad 159281 wrote:

Wow I’ve never seen that before. What kind of sealant do you use, saltwater? Just kidding. I wonder if it was the dissimilar metals of the valve stem and the rim combined with the sealant that accelerated corrosion in that area.

Yeah, my best guess is it’s a “brass stem + aluminum rim + Amalitza rides in all weather including wet and salted roads and doesn’t clean her bike as often as she should after” problem, rather than a sealant (Stans) specific problem. The interwebs tell me I’m not the first person to see this, and that some people blame Stans (because ammonia) and others don’t. The fact that the corrosion is only at the stem, where water incursion is most likely, and nowhere else , which would all have been exposed to sealant (the rest of the rim surfaces look pristine), makes me believe it is probably not the sealant. Probably.

May 1, 2017 at 12:03 am #1070102

anomad
Participant

Luescher Teknik over on YouTube has a study going on now for 4-5 years with different spoke nipples bathed in Stans. The only nipples that show corrosion are the non anodized variety.

May 1, 2017 at 12:04 am #1070103

vvill
Participant

Clearly, you *need* carbon wheels!

May 1, 2017 at 2:47 am #1070105

hozn
Participant

But isn’t the corrosion on the rim center channel and not the spoke bed? I guess I am not sure how these rims are constructed, but would have been surprised if the spoke nipples we’re in contact with the rim bed.

Sent from my LEX727 using Tapatalk

May 1, 2017 at 10:45 am #1070107

anomad
Participant

Yeah, I just mentioned the Raul’s video because he demonstrates unprotected aluminum will corrode a little. The corrosion here was around the valve stem.

@hozn 159288 wrote:

But isn’t the corrosion on the rim center channel and not the spoke bed? I guess I am not sure how these rims are constructed, but would have been surprised if the spoke nipples we’re in contact with the rim bed.

Sent from my LEX727 using Tapatalk

May 1, 2017 at 11:42 am #1070109

hozn
Participant

@anomad 159290 wrote:

Yeah, I just mentioned the Raul’s video because he demonstrates unprotected aluminum will corrode a little. The corrosion here was around the valve stem.

Ah, I see; yes, that makes sense. Maybe tape just around valve stem would make sense.

May 1, 2017 at 1:28 pm #1070118

Anonymous
Guest

@vvill 159285 wrote:

Clearly, you *need* carbon wheels!

Clearly!!!

June 14, 2017 at 4:26 pm #1072186

anomad
Participant

I took my rear wheel off to replace a few spokes Monday. I was surprised at how much water was inside the rims. I also had a tiny amount of white (probably oxidation) around the valve hole. I just greased it and put it back together, but its something I will keep an eye on with those wheels.
Author

Posts

Viewing 10 posts - 1 through 10 (of 10 total)

You must be logged in to reply to this topic.