I am just trying to install my bike tubeless right now. The tire without sealant seems to be air tight, except for the valve. As you can see the o ring is bulging out on one side and not on the other one, making the valve leak air.
My tire is the fsa agx i21.
The valve hole is slighty offset. Do I need special assymetrical valves for these kind of wheels or can I somehow make the ones I have fit?
Thx for all the tips in advance.
Edit: I uploaded the tabe job + photos of the valve does this look allright?
Tape:
https://imgur.com/a/5m4BjBf
Valve inside : https://imgur.com/a/3eT1doM
by Fuzzy-Active5583
10 Comments
Here is a link to my tires if that helps anyone: https://shop.fullspeedahead.com/de/wheelsets/mtb-gravel/agx-wheelset
Take that o ring off it doesn’t need to be there
The o ring on that side isn’t do anything but keeping the nut from scratching the rim.
Situate your wheel so that the valve is at the 6 o clock position. Let the sealant pool along the valve area for a while. It might take a day or so, but it will eventually seal.
The problem is either at the base of the valve (inside, where we can’t see) or with the tape. The O ring pictured doesn’t need to be airtight
My Ridenow valves came with curved black plastic spacers that’d probably fit your rims. I had to take them off because I needed flat contact areas.
I had the issue and the problem was the tape allowing air into the rim section where the spoke holes were and this near the valve stem
One thing I always do is put a bit of light grease around the rubber part of the valve stem that forms the seal. Also a tip for the rim tape is to put it under a fair bit of pressure/stretch it and to use a tyre lever or similar to flatten it out where needed.
btw my first attempts to cut the tape for the valve was a big X. I also had a lot of leaks.
I then punched a tiny hole into the tape and forced the valve through that. No more leaks.
Otherwise, I’d crank down on the grommet nut with small pliers to be sure it is tight before you redo everything. Obviously if the valve is not fitting correctly in the rim channel, you have to fix that.
you don’t want air leaking into the rim if it is completely sealed – danger. some companies have switched to valve nuts that allow air through to mitigate this issue. you have air getting into the rim so the tape is your issue here. the only seal the valve needs to make is at the rim bed